changeable
changeful
disposable
fluid drachm
graceful
liquid
able to adapt
adaptable
adjustable
aerodynamics
afterdamp
air
alterable
alterative
aqueous
atmosphere
aura
beverage
blackdamp
blood
breath
checkered
chokedamp
cloud
damp
drink
effluvium
ever-changing
exhalation
fetid air
firedamp
flatus
flexible
flowing
fluent
fluid extract
fluid mechanics
fluidal
fluidic
fluxible
fluxile
fluxional
fluxionary
formless
fume
gas
halogen gas
humor
hydraulics
hydrogeology
ichor
impermanent
indefinite
fluctuate
fluency
flux
acid
chemical
dust
energy
flow
juice
material
metal
moisture
oxygen
particle
powder
steam
substance
tissue
vapor
water
druid