gravity vs stuffiness

gravity and stuffiness both are nouns.

Word	Noun	Adjective	Verb	Adverb
gravity	Yes	No	No	No
stuffiness	Yes	No	No	No

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

Other hyponyms of gravity include stodginess.

gravity (noun)	stuffiness (noun)
a manner that is serious and solemn	dull and pompous gravity
a solemn and dignified feeling	the quality of being close and poorly ventilated
(physics) the force of attraction between all masses in the universe; especially the attraction of the earth's mass for bodies near its surface	state of obstruction or stoppage or air in the nose or throat