coma vs astronomy

coma and astronomy both are nouns.

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

coma (noun)	astronomy (noun)
a state of deep and often prolonged unconsciousness; usually the result of disease or injury	the branch of physics that studies celestial bodies and the universe as a whole
(astronomy) the luminous cloud of particles surrounding the frozen nucleus of a comet; forms as the comet approaches the sun and is warmed
(botany) a usually terminal tuft of bracts (as in the pineapple) or tuft of hairs (especially on certain seeds)