asker vs ask

asker is a noun but ask is not a noun.

Word	Noun	Adjective	Verb	Adverb
asker	Yes	No	No	No
ask	No	No	Yes	No

asker (noun)	ask (noun)
someone who asks a question

asker (verb)	ask (verb)
	make a request or demand for something to somebody
	direct or put; seek an answer to
	address a question to and expect an answer from
	consider obligatory; request and expect
	require or ask for as a price or condition
	make a date
	require as useful, just, or proper