oppose vs follow up on

oppose and follow up on both are verbs.

Word	Noun	Adjective	Verb	Adverb
oppose	No	No	Yes	No
follow up on	No	No	Yes	No

As verbs, follow up on is a hyponym of oppose; that is, follow up on is a word with a more specific, narrower meaning than oppose:

Other hyponyms of oppose include act on, pursue, buck, go against.

oppose (verb)	follow up on (verb)
be resistant to	carry further or advance
be against; express opposition to
set into opposition or rivalry
fight against or resist strongly
act against or in opposition to
contrast with equal weight or force