portrait vs semblance

portrait and semblance both are nouns.

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

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

Other hypernyms of portrait include likeness.

portrait (noun)	semblance (noun)
any likeness of a person, in any medium	picture consisting of a graphic image of a person or thing
a word picture of a person's appearance and character	an outward or token appearance or form that is deliberately misleading
	an erroneous mental representation