enter vs entering

enter is not a noun while entering is a noun.

Word	Noun	Adjective	Verb	Adverb
enter	No	No	Yes	No
entering	Yes	No	No	No

enter (noun)	entering (noun)
	the act of entering
	a movement into or inward

enter (verb)	entering (verb)
set out on (an enterprise or subject of study)
make a record of; set down in permanent form
become a participant; be involved in
put or introduce into something
come on stage
to come or go into
take on duties or office
register formally as a participant or member
be or play a part of or in