dead, live, living
the export of live animals for slaughter

cold-blooded, warm-blooded
higher, lower
dumb
stuffed
glass cases of stuffed animals
She sleeps with lots of stuffed animals.

furry
dangerous
endangered, rare
extinct
social, solitary
tame
feral, stray, wild
exotic
non-human (technical)
research with humans and non-human animals

caged, trapped, wounded (often figurative)
He was pacing the room like a caged animal.

barnyard (AmE), companion, domestic, domesticated, farm, lab (informal, esp. AmE), laboratory, zoo
aquatic, forest, land, marine
draught/draft, pack
pack animals such as mules

have, keep
In court he was banned from keeping animals.

breed, raise, rear (esp. BrE)
animals bred in captivity

clone
Most cloned animals die at a premature age.

feed
The animals were fed only on pasture.

tame, train
This animal can be trained to follow simple orders.

hunt, trap
butcher, kill, slaughter
sacrifice

life, species
behaviour/behavior, instinct
lover
husbandry
experimentation, experiments, testing, tests
protests against animal experiments

cruelty
rights, welfare
fat, products

the animal kingdom, the animal world
the wonders of the animal kingdom

a species of animal

Animal is used with these nouns:
cunning, instinct, lust, magnetism, passion