untruthfulness vs dishonesty

untruthfulness and dishonesty both are nouns.

Word	Noun	Adjective	Verb	Adverb
untruthfulness	Yes	No	No	No
dishonesty	Yes	No	No	No

As nouns, dishonesty is a hypernym of untruthfulness; that is, dishonesty is a word with a broader meaning than untruthfulness:

untruthfulness (noun)	dishonesty (noun)
the quality of being untruthful	lack of honesty; acts of lying or cheating or stealing
	the quality of being dishonest