portrayal vs picturing

portrayal and picturing both are nouns.

Word	Noun	Adjective	Verb	Adverb
portrayal	Yes	No	No	No
picturing	Yes	No	No	No

As nouns, picturing is a hypernym of portrayal; that is, picturing is a word with a broader meaning than portrayal:

Other hypernyms of portrayal include pictorial representation.

portrayal (noun)	picturing (noun)
representation by drawing or painting etc	visual representation as by photography or painting
acting the part of a character on stage; dramatically representing the character by speech and action and gesture	visual imagery
any likeness of a person, in any medium
a representation by picture or portraiture
a word picture of a person's appearance and character