corrupt vs underhand

corrupt and underhand both are adjectives.

Word	Noun	Adjective	Verb	Adverb
corrupt	No	Yes	Yes	No
underhand	No	Yes	No	Yes

corrupt (adjective)	underhand (adjective)
lacking in integrity	with hand brought forward and up from below shoulder level
not straight; dishonest or immoral or evasive	marked by deception
containing errors or alterations
touched by rot or decay

corrupt (verb)	underhand (verb)
alter from the original
place under suspicion or cast doubt upon
make illegal payments to in exchange for favors or influence
corrupt morally or by intemperance or sensuality

corrupt (adverb)	underhand (adverb)
	with the hand swung below shoulder level
	slyly and secretly