fly-by-night

equivalents

impermanent

temporary

untrustworthy

untrusty

synonyms

brittle

capricious

changeable

corruptible

deciduous

dying

ephemeral

evanescent

fading

fickle

fleeting

flitting

flying

fragile

frail

fugacious

fugitive

impermanent

impetuous

impulsive

inconstant

insubstantial

irresponsible

momentary

mortal

mutable

nondurable

nonpermanent

passing

perishable

short-lived

temporal

temporary

transient

transitive

transitory

trustless

undependable

undurable

unenduring

unfaithworthy

unreliable

unstable

unsure

untrustworthy

untrusty

volatile

hypernyms

debitor

debtor

same-contexts

4-star

41-year

Cardiff

cancer-related

ecclesial

indie-rock

money-making

over-reaching

oxyacetylene

pressure cooker

six-pound

slave-trading

squidskin

water-seal