acting
ephemeral
episodic
evanescent
fly-by-night
fugacious
improvised
interim
jury-rigged
makeshift
part-time
passing
pro tem
pro tempore
shipboard
short-lived
temporal
terminable
transient
transitory
working
ad hoc
ad interim
alternate
alternative
backup
band-aid
blue-collar worker
breadwinner
brittle
capricious
casual
casual laborer
changeable
common laborer
corruptible
counterfeit
dangerous
day laborer
deciduous
desultory
dummy
dying
employee
equivalent
ersatz
factory worker
fading
fake
fickle
flashing
fleeting
flitting
flunky
flying
fragile
frail
free lance
free-lancer
fugitive
full-time worker
hand
hazardous
imitation
impermanent
worker
actual
additional
immediate
permanent
contemporary
eternal
lasting