portrait vs characterization

portrait and characterization both are nouns.

Word	Noun	Adjective	Verb	Adverb
portrait	Yes	No	No	No
characterization	Yes	No	No	No

As nouns, characterization is a hypernym of portrait; that is, characterization is a word with a broader meaning than portrait:

Other hypernyms of portrait include characterisation, delineation, depiction, picture, word-painting, word picture.

portrait (noun)	characterization (noun)
any likeness of a person, in any medium	acting the part of a character on stage; dramatically representing the character by speech and action and gesture
a word picture of a person's appearance and character	a graphic or vivid verbal description
	the act of describing distinctive characteristics or essential features