unmitigated vs arrant

unmitigated and arrant both are adjectives.

Word	Noun	Adjective	Verb	Adverb
unmitigated	No	Yes	No	No
arrant	No	Yes	No	No

unmitigated (adjective)	arrant (adjective)
not diminished or moderated in intensity or severity; sometimes used as an intensifier	without qualification; used informally as (often pejorative) intensifiers