belong vs pertain

belong and pertain both are verbs.

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

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

Other hyponyms of belong include inhere, appertain.

belong (verb)	pertain (verb)
be owned by; be in the possession of	be a part or attribute of
be rightly classified in a class or category	be relevant to
be suitable or acceptable
be in the right place or situation
be a part or adjunct
be a member, adherent, inhabitant, etc. (of a group, organization, or place)