nastiness vs bitchiness

nastiness and bitchiness both are nouns.

Word	Noun	Adjective	Verb	Adverb
nastiness	Yes	No	No	No
bitchiness	Yes	No	No	No

As nouns, nastiness and bitchiness are synonyms defined as:

nastiness and bitchiness: malevolence by virtue of being malicious or spiteful or nasty

Other synonyms of nastiness include cattiness, spite, spitefulness.

nastiness (noun)	bitchiness (noun)
the quality of being highly unpleasant	malevolence by virtue of being malicious or spiteful or nasty
malevolence by virtue of being malicious or spiteful or nasty
a state characterized by foul or disgusting dirt and refuse