harmonizer vs player

harmonizer and player both are nouns.

Word	Noun	Adjective	Verb	Adverb
harmonizer	Yes	No	No	No
player	Yes	No	No	No

As nouns, player is a hypernym of harmonizer; that is, player is a word with a broader meaning than harmonizer:

Other hypernyms of harmonizer include instrumentalist, musician.

harmonizer (noun)	player (noun)
a mediator who brings one thing into harmonious agreement with another	a theatrical performer
a musician who sings or plays in harmony	a person who participates in or is skilled at some game
	someone who plays a music as a profession
	a person who pursues a number of different social and sexual partners simultaneously
	someone who takes part in an activity