limb vs bough

limb and bough both are nouns.

Word	Noun	Adjective	Verb	Adverb
limb	Yes	No	No	No
bough	Yes	No	No	No

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

Other hyponyms of limb include stick.

limb (noun)	bough (noun)
any projection that is thought to resemble a human arm	any of the larger branches of a tree
the graduated arc that is attached to an instrument for measuring angles
either of the two halves of a bow from handle to tip
one of the jointed appendages of an animal used for locomotion or grasping: arm, leg, wing, flipper
(astronomy) the circumferential edge of the apparent disc of the sun or the moon or a planet
any of the main branches arising from the trunk or a bough of a tree