well up vs originate

well up and originate both are verbs.

Word	Noun	Adjective	Verb	Adverb
well up	No	No	Yes	No
originate	No	No	Yes	No

As verbs, originate is a hypernym of well up; that is, originate is a word with a broader meaning than well up:

Other hypernyms of well up include arise, develop, grow, rise, spring up, uprise.

well up (verb)	originate (verb)
come up (as of feelings and thoughts, or other ephemeral things)	bring into being
	come into existence; take on form or shape
	begin a trip at a certain point, as of a plane, train, bus, etc.