bud vs leaf bud

bud and leaf bud both are nouns.

Word	Noun	Adjective	Verb	Adverb
bud	Yes	No	Yes	No
leaf bud	Yes	No	No	No

As nouns, leaf bud is a hyponym of bud; that is, leaf bud is a word with a more specific, narrower meaning than bud:

bud: a swelling on a plant stem consisting of overlapping immature leaves or petals
leaf bud: a bud from which leaves (but not flowers) develop

Other hyponyms of bud include flower bud, mixed bud.

bud (noun)	leaf bud (noun)
a swelling on a plant stem consisting of overlapping immature leaves or petals	a bud from which leaves (but not flowers) develop
a partially opened flower

bud (verb)	leaf bud (verb)
develop buds
start to grow or develop