unmannerly vs bad-mannered

unmannerly and bad-mannered both are adjectives.

Word	Noun	Adjective	Verb	Adverb
unmannerly	No	Yes	No	No
bad-mannered	No	Yes	No	No

As adjectives, unmannerly and bad-mannered are synonyms defined as:

Other synonyms of unmannerly include ill-mannered, rude, unmannered.

unmannerly (adjective)	bad-mannered (adjective)
socially incorrect in behavior	socially incorrect in behavior