gravity vs soberness

gravity and soberness both are nouns.

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

As nouns, gravity and soberness are synonyms defined as:

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

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