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Synonyms for fly by night
adj unreliable and shady

ephemeral
passing
temporary
brief
cowboy
disreputable
dubious

evanescent
fleeting
impermanent
irresponsible
momentary
questionable
shady

shifty
short-lived
slimy
slippery
treacherous
undependable
unprofessional

unreliable
unsure
untrustworthy
here-today-gone-tomorrow
not to be relied upon
not to be trusted
trustless

Antonyms for fly by night

enduring
lasting
permanent

dependable
reliable
reputable

trustworthy
long
responsible

Synonyms
adj fleeting

temporary
transient
ephemeral

brief
evanescent
impermanent

passing
temporal
fugacious

Antonyms

enduring
lasting

permanent
long-lived

perpetual
lengthy

Synonyms
adj doubtful

questionable
skeptical
unclear
uncertain
equivocal
hesitant
improbable
problematic
shady
suspicious

arguable
fishy
unreliable
unsure
reluctant
debatable
chancy
diffident
disputable
far-fetched

fly-by-night
iffy
indecisive
moot
open
perplexed
suspect
undecided
undependable
unlikely

untrustworthy
wavering
dubitable
mootable
unconvinced
touch and go
trustless
unassured
untrusty

Antonyms

undoubted
unquestionable
determined
believable
likely
probable
aboveboard
trustworthy

honest
reliable
trusty
unambiguous
certain
definite
sure
clear

secure
doubtless
positive
undoubtful
indubious
unobscure

Synonyms
noun person escaping from law or other pursuer

deserter
refugee
outcast
escapee
exile
recluse
outlaw

stray
fly-by-night
waif
transient
vagabond
derelict
truant

runaway
hermit
émigré
displaced person
runagate
evacuee
walkout

dodger
bolter
escaper
hunted person

Synonyms
adj made-up

spontaneous
impromptu
makeshift
ad-lib
extemporaneous

extempore
fly-by-night
hit-or-miss
offhand
unprepared

unrehearsed
unstudied
spur-of-the-moment
extemporized
Band-Aid

autoschediastic
improviso

Antonyms

planned
designed

rehearsed
premediated

Synonyms
adj weak, imaginary

illusory
flimsy
unreal
fanciful
tenuous
puny
unsubstantial
aerial

airy
chimerical
decrepit
ephemeral
feeble
fly-by-night
fragile
frail

idle
immaterial
incorporeal
infirm
intangible
metaphysical
petty
poor

slender
slight
thin
unsound
imponderable
false
too little too late

Antonyms

real
genuine

strong
substantial

thick
serious

Synonyms
adj careless, reckless

capricious
immature
thoughtless
immoral
carefree
devil-may-care
feckless
fickle

flighty
fly-by-night
giddy
harebrained
incautious
lax
loose
rash

scatterbrained
shiftless
unaccountable
undependable
unpredictable
unreliable
unstable
untrustworthy

wild
ill-considered
no-account
unanswerable
uncareful

Antonyms

accountable
careful

reliable
trustworthy

liable
responsible

Synonyms
adj deceitful, untrustworthy

tricky
wily
sneaky
shrewd
slippery
cagey
crafty
collusive
crooked
cunning

devious
dishonest
duplicitous
elusive
evasive
fly-by-night
foxy
fraudulent
furtive
insidious

lying
mendacious
roguish
scheming
shady
slick
slimy
sly
treacherous
underhand

unprincipled
untruthful
conniving
contriving
dodging
equivocating
prevaricative
prevaricatory
shuffling
unhonest

Antonyms

aboveboard
frank

honest
naive

forthright
trustworthy

Synonyms
adj not around for long

fleeting
ephemeral
brief
transitory
temporary
short-term

momentary
evanescent
fly-by-night
fugitive
impermanent
passing

quick
short
transient
fugacious
deciduous
gone in a heartbeat

of short duration
over in a heartbeat
short-haul
short-run

Antonyms

enduring
lasting
long-lived

permanent
perpetual
ethereal

lengthy
long

Synonyms
adj uncertain, unreliable

tricky
elusive
treacherous
unsafe
smooth
slick
unpredictable
unstable

shifty
cagey
changeable
crafty
cunning
devious
dishonest
duplicitous

evasive
fly-by-night
foxy
inconstant
insecure
mutable
sneaky
two-faced

unsteady
untrustworthy
variable
slithery
false

Antonyms

frank
honest
forthright
harmless

reliable
stable
coarse
rough

dry
certain
definite
unslippery

Synonyms
adj careless; not well done

bedraggled
disheveled
faulty
fly-by-night
haphazard
imperfect
inaccurate
inexact
loose

messy
neglected
negligent
raunchy
scruffy
shabby
shoddy
slapdash
sloppy

slovenly
tacky
tattered
threadbare
unkempt
untidy
scrubby
unsystematic
botched

fouled-up
junky
messed-up
screwed-up
unmeticulous
unthorough

Antonyms

careful
neat

polished
refined

well-done

Synonyms
adj temporary, brief

changeable
ephemeral
evanescent
flash
fleeting
flitting
fly-by-night

flying
fugitive
impermanent
insubstantial
momentary
moving
passing

provisional
short
short-lived
temporal
unstable
volatile
fugacious

short-term
transmigratory
deciduous
emigrating
going by
migrating
vacating

Antonyms

enduring
incessant
lasting

long-lasting
permanent
persistent

undying
neverending

Synonyms
adj dishonest, disloyal

tricky
unreliable
slippery
catchy
deceitful
deceptive
double-dealing
duplicitous

faithless
fly-by-night
insidious
misleading
perfidious
recreant
shifty
slick

snake in the grass
traitorous
two-faced
two-timing
undependable
unfaithful
untrue
untrustworthy

false-hearted
treasonable
false
betraying
double-crossing
unloyal

Antonyms

honest
reliable
forthright

loyal
harmless
true

untreacherous

Synonyms
adj irresponsible

unreliable
bum
capricious
careless
changeable
dubious
erratic
fickle

fly-by-night
inconsistent
inconstant
indefinite
indeterminate
loose
treacherous
trick

tricky
uncertain
unpredictable
unsafe
unsound
unstable
unsure
untrustworthy

variable
no-good
no bargain
trustless
unassured

Antonyms

dependable
reliable

trustworthy
responsible

Synonyms
adj dishonest, immoral

unscrupulous
illegal
unprofessional
unfair
improper
wrong
corrupt
cheating

crooked
dirty
dishonorable
disreputable
fake
fishy
flimflam
fly-by-night

mercenary
scam
shady
sharp
slick
slippery
sneaky
two-faced

two-timing
underhand
unprincipled
dirty-dealing
double-crossing

Antonyms

ethical
moral
principled
honest

appropriate
suitable
good
right

correct
decent
uncorrupt
upright

Synonyms
adj not trustworthy, not true

tricky
uncertain
inaccurate
irresponsible
treacherous
dubious
unsound
fickle
unstable
deceptive
untrustworthy

capricious
undependable
deceitful
delusive
disreputable
erroneous
fake
fallible
fly-by-night
furtive
hollow

implausible
inconstant
makeshift
meretricious
mistaken
pretended
pseudo
questionable
sham
shifty
specious

unconvincing
underhand
underhanded
unfaithful
unsure
untrue
vacillating
wavering
weak
hallucinatory
false

Antonyms

frank
honest
reliable
trustworthy
forthright
stable
truthful

dependable
certain
clear
definite
sure
accurate
correct

right
true
strong
constant
faithful
steady
responsible

Synonyms
adj doubtful, insecure

shaky
skeptical
unclear
uncertain
hesitant
indecisive
suspicious
mistrustful
dubious
undecided

distrustful
borderline
fly-by-night
iffy
indeterminate
irresolute
lacking
open
problematic
undependable

unreliable
unstable
untrustworthy
vacillating
wavering
weak
wobbly
unconvinced
betwixt and between
fluctuant

in a quandary
rootless
touch and go
unassured
unconfident
untrusty
up for grabs
wimpy

Antonyms

unwavering
believing
determined
trustworthy

trusty
undoubted
certain
sure

clear
definite
secure
indubious

Synonyms
adj not dependable, unfaithful

treacherous
deceitful
dishonest
irresponsible
disloyal
unsafe
unreliable
capricious
crooked

devious
dubious
faithless
fickle
fink
fly-by-night
questionable
shady
sharp

shifty
slippery
sneaky
tricky
two-faced
two-timing
undependable
unsure
untrue

guileful
false
untrusty
conniving
fair-weather
trustless
unassured

Antonyms

honest
loyal
harmless
reliable

truthful
frank
trustworthy
dependable

true
faithful
open
responsible

Synonyms
adj unsettled; vagrant

stray
fly-by-night
rambling
itinerant
down-and-out
mendicant
unsettled
peripatetic
transient

moving
wayfaring
roaming
roving
wandering
idle
prodigal
aimless
destitute

errant
fancy-free
footloose
migratory
nomadic
shiftless
wayward
strolling
journeying

travelling
drifting
itinerate
rootless
straggling
shifting
sauntering
perambulant
perambulatory

Antonyms

permanent
settled

unmoving
fixed

inhabiting

Synonyms
adj temporary

ephemeral
fleeting
transitory
short-term
flash
temporal
flying
brief

fugitive
short
volatile
passing
fly-by-night
changeable
evanescent
flitting

impermanent
insubstantial
momentary
moving
provisional
short-lived
unstable
fugacious

transmigratory
deciduous
emigrating
going by
migrating
vacating

Antonyms

enduring
lasting
permanent

perpetual
long-lived
long

lengthy