belong to vs pertain

belong to and pertain both are verbs.

Word	Noun	Adjective	Verb	Adverb
belong to	No	No	Yes	No
pertain	No	No	Yes	No

As verbs, pertain is a hyponym of belong to; that is, pertain is a word with a more specific, narrower meaning than belong to:

Other hyponyms of belong to include inhere, appertain.

belong to (verb)	pertain (verb)
be a part or adjunct	be a part or attribute of
	be relevant to