prevarication vs untruth

prevarication and untruth both are nouns.

Word	Noun	Adjective	Verb	Adverb
prevarication	Yes	No	No	No
untruth	Yes	No	No	No

As nouns, untruth is a hypernym of prevarication; that is, untruth is a word with a broader meaning than prevarication:

Other hypernyms of prevarication include falsehood, falsity.

prevarication (noun)	untruth (noun)
the deliberate act of deviating from the truth	a false statement
intentionally vague or ambiguous
a statement that deviates from or perverts the truth