overtrump vs trump

overtrump is not a noun while trump is a noun.

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

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

Other hypernyms of overtrump include ruff.

overtrump (noun)	trump (noun)
	a playing card in the suit that has been declared trumps
	a brass musical instrument with a brilliant tone; has a narrow tube and a flared bell and is played by means of valves
	(card games) the suit that has been declared to rank above all other suits for the duration of the hand

overtrump (verb)	trump (verb)
play a trump higher than (one previously played) to the trick	proclaim or announce with or as if with a fanfare
	get the better of
	play a trump
	produce a sound as if from a trumpet