powwow vs discuss

powwow is a noun but discuss is not a noun.

Word	Noun	Adjective	Verb	Adverb
powwow	Yes	No	Yes	No
discuss	No	No	Yes	No

As verbs, discuss is a hypernym of powwow; that is, discuss is a word with a broader meaning than powwow:

powwow: hold a powwow, talk, conference or meeting
discuss: speak with others about (something); talk (something) over in detail; have a discussion

Other hypernyms of powwow include hash out, talk over.

powwow (noun)	discuss (noun)
(informal) a quick private conference
a council of or with Native Americans

powwow (verb)	discuss (verb)
hold a powwow, talk, conference or meeting	speak with others about (something); talk (something) over in detail; have a discussion
	to consider or examine in speech or writing