alone
animal
ape
block
cage
captive
captivity
capture
catch
confinement
desperate
detention
environmental
escape
exhibit
finger
free
freedom
furry
hairy
hand
imprison
imprisoned
incarcerate
incarcerated
independence
iron
jail
liberal
liberty
locked
lockup
mammals
monkey
persecution
primate
prison
prisoner
protected
punishment
solitude
sorrow
trapped
wildlife
zoo