commitment vs sincerity

commitment and sincerity both are nouns.

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

As nouns, sincerity is a hypernym of commitment; that is, sincerity is a word with a broader meaning than commitment:

Other hypernyms of commitment include earnestness, serious-mindedness, seriousness.

commitment (noun)	sincerity (noun)
the act of binding yourself (intellectually or emotionally) to a course of action	the quality of being open and truthful; not deceitful or hypocritical
the official act of consigning a person to confinement (as in a prison or mental hospital)	the trait of being serious
an engagement by contract involving financial obligation	a quality of naturalness and simplicity
the trait of sincere and steadfast fixity of purpose	an earnest and sincere feeling
a message that makes a pledge