get together vs function

get together and function both are nouns.

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

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

Other hypernyms of get together include affair, occasion, social affair, social function, social gathering, social occasion.

get together (noun)	function (noun)
a small informal social gathering	the actions and activities assigned to or required or expected of a person or group
	what something is used for
	a set sequence of steps, part of larger computer program
	a formal or official social gathering or ceremony of people
	a formal or official social gathering or ceremony
	(mathematics) a mathematical relation such that each element of a given set (the domain of the function) is associated with an element of another set (the range of the function)
	a relation such that one thing is dependent on another

get together (verb)	function (verb)
get together socially or for a specific purpose	perform duties attached to a particular office or place or function
become part of; become a member of a group or organization	perform as expected when applied
get people together	serve a purpose, role, or function