come in vs penetrate

come in and penetrate both are verbs.

Word	Noun	Adjective	Verb	Adverb
come in	No	No	Yes	No
penetrate	No	No	Yes	No

As verbs, penetrate is a hyponym of come in; that is, penetrate is a word with a more specific, narrower meaning than come in:

come in (verb)	penetrate (verb)
take a place in a competition; often followed by an ordinal	come to understand
to insert between other elements	become clear or enter one's consciousness or emotions
be received	pass into or through, often by overcoming resistance
to come or go into	insert the penis into the vagina or anus of
come into fashion; become fashionable	spread or diffuse through
	make one's way deeper into or through
	enter a group or organization in order to spy on the members