overtrump vs ruff

overtrump is not a noun while ruff is a noun.

Word	Noun	Adjective	Verb	Adverb
overtrump	No	No	Yes	No
ruff	Yes	No	Yes	No

As verbs, ruff is a hypernym of overtrump; that is, ruff is a word with a broader meaning than overtrump:

Other hypernyms of overtrump include trump.

overtrump (noun)	ruff (noun)
	(card games) the act of taking a trick with a trump when unable to follow suit
	common Eurasian sandpiper; the male has an erectile neck ruff in breeding season
	a high tight collar
	an external body part consisting of feathers or hair about the neck of a bird or other animal

overtrump (verb)	ruff (verb)
play a trump higher than (one previously played) to the trick	play a trump