impermanent
temporary
able to adapt
adaptable
adjustable
adventurer
alpinist
alterable
alterative
arising
astronaut
board-and-roomer
boarder
brief
brittle
camper
capricious
changeable
checkered
circumforaneous
climber
comers and goers
coming
commuter
compact
compendious
concise
corruptible
cosmopolite
cruiser
curt
curtal
curtate
deciduous
decurtate
disappearing
discursive
dissolving
divagatory
drifting
dying
emanating
emanative
emanent
emergent
emerging
ephemeral
ephemeron
errant
evanescent
evaporating
oscillation
traveler
traveller
vibration
accidental
earthly
fleeting
intermittent
momentary
short-lived
superficial
uncertain
recurrent