beastliness vs beastly

beastliness is a noun but beastly is not a noun.

Word	Noun	Adjective	Verb	Adverb
beastliness	Yes	No	No	No
beastly	No	Yes	No	Yes

beastliness (noun)	beastly (noun)
unpleasant nastiness; used especially of nasty weather
the quality of being deliberately mean

beastliness (adjective)	beastly (adjective)
	resembling a beast; showing lack of human sensibility
	(informal) very unpleasant

beastliness (adverb)	beastly (adverb)
	in a beastly manner