bird's foot vs claw

bird's foot and claw both are nouns.

As nouns, claw is a hyponym of bird's foot; that is, claw is a word with a more specific, narrower meaning than bird's foot:

Other hyponyms of bird's foot include zygodactyl foot, heterodactyl foot, webbed foot, lobate foot.

bird's foot (noun)	claw (noun)
the foot of a bird	sharp curved horny process on the toe of a bird or some mammals or reptiles
	a mechanical device that is curved or bent to suspend or hold or pull something
	a grasping structure on the limb of a crustacean or other arthropods
	a bird's foot

bird's foot (verb)	claw (verb)
	move as if by clawing, seizing, or digging
	clutch as if in panic
	scratch, scrape, pull, or dig with claws or nails
	attack as if with claws