sincerity vs sobriety

sincerity and sobriety both are nouns.

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

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

sincerity (noun)	sobriety (noun)
the quality of being open and truthful; not deceitful or hypocritical	abstaining from excess
the trait of being serious	a manner that is serious and solemn
a quality of naturalness and simplicity	moderation in or abstinence from alcohol or other drugs
an earnest and sincere feeling	the state of being sober and not intoxicated by alcohol