thievishness vs dishonesty

thievishness and dishonesty both are nouns.

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

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

thievishness (noun)	dishonesty (noun)
having a disposition to steal	lack of honesty; acts of lying or cheating or stealing
	the quality of being dishonest