know vs ignore

know is a noun but ignore is not a noun.

Word	Noun	Adjective	Verb	Adverb
know	Yes	No	Yes	No
ignore	No	No	Yes	No

know (noun)	ignore (noun)
the fact of being aware of information that is known to few people

know (verb)	ignore (verb)
be familiar or acquainted with a person or an object	be ignorant of or in the dark about
be cognizant or aware of a fact or a specific piece of information; possess knowledge or information about	give little or no attention to
know how to do or perform something	bar from attention or consideration
have firsthand knowledge of states, situations, emotions, or sensations	refuse to acknowledge
accept (someone) to be what is claimed or accept his power and authority	fail to notice
know the nature or character of
be able to distinguish, recognize as being different
perceive as familiar
have fixed in the mind
have sexual intercourse with