penetrate vs get together

penetrate is not a noun while get together is a noun.

Word	Noun	Adjective	Verb	Adverb
penetrate	No	No	Yes	No
get together	Yes	No	Yes	No

As verbs, get together is a hypernym of penetrate; that is, get together is a word with a broader meaning than penetrate:

Other hypernyms of penetrate include fall in, join.

penetrate (noun)	get together (noun)
	a small informal social gathering

penetrate (verb)	get together (verb)
come to understand	get together socially or for a specific purpose
become clear or enter one's consciousness or emotions	become part of; become a member of a group or organization
pass into or through, often by overcoming resistance	get people together
insert the penis into the vagina or anus of
spread or diffuse through
make one's way deeper into or through
enter a group or organization in order to spy on the members