truism vs truth

truism and truth both are nouns.

Word	Noun	Adjective	Verb	Adverb
truism	Yes	No	No	No
truth	Yes	No	No	No

As nouns, truth is a hypernym of truism; that is, truth is a word with a broader meaning than truism:

Other hypernyms of truism include true statement.

truism (noun)	truth (noun)
an obvious truth	the quality of being near to the true value
	a fact that has been verified
	a true statement
	conformity to reality or actuality