gravity vs sobriety

gravity and sobriety both are nouns.

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

As nouns, gravity and sobriety are synonyms defined as:

Other synonyms of gravity include graveness, soberness, somberness, sombreness.

gravity (noun)	sobriety (noun)
a manner that is serious and solemn	abstaining from excess
a solemn and dignified feeling	a manner that is serious and solemn
(physics) the force of attraction between all masses in the universe; especially the attraction of the earth's mass for bodies near its surface	moderation in or abstinence from alcohol or other drugs
	the state of being sober and not intoxicated by alcohol