visualizer vs perceiver

visualizer and perceiver both are nouns.

Word	Noun	Adjective	Verb	Adverb
visualizer	Yes	No	No	No
perceiver	Yes	No	No	No

As nouns, perceiver is a hypernym of visualizer; that is, perceiver is a word with a broader meaning than visualizer:

visualizer: one whose prevailing mental imagery is visual
perceiver: a person who becomes aware (of things or events) through the senses

Other hypernyms of visualizer include beholder, observer, percipient.

visualizer (noun)	perceiver (noun)
one whose prevailing mental imagery is visual	a person who becomes aware (of things or events) through the senses