downright vs out-and-out

downright and out-and-out both are adjectives.

Word	Noun	Adjective	Verb	Adverb
downright	No	Yes	No	Yes
out-and-out	No	Yes	No	No

As adjectives, downright and out-and-out are synonyms defined as:

downright and out-and-out: complete and without restriction or qualification; sometimes used informally as intensifiers

Other synonyms of downright include absolute, rank, right-down, sheer.

downright (adjective)	out-and-out (adjective)
complete and without restriction or qualification; sometimes used informally as intensifiers	complete and without restriction or qualification; sometimes used informally as intensifiers
characterized by plain blunt honesty

downright (adverb)	out-and-out (adverb)
thoroughgoing