pop in vs enter

pop in and enter both are verbs.

Word	Noun	Adjective	Verb	Adverb
pop in	No	No	Yes	No
enter	No	No	Yes	No

As verbs, enter is a hypernym of pop in; that is, enter is a word with a broader meaning than pop in:

Other hypernyms of pop in include come in, get in, get into, go in, go into, move into.

pop in (verb)	enter (verb)
enter briefly	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