limb vs astronomy

limb and astronomy both are nouns.

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

limb (noun)	astronomy (noun)
any projection that is thought to resemble a human arm	the branch of physics that studies celestial bodies and the universe as a whole
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