stand firm vs oppose

stand firm and oppose both are verbs.

Word	Noun	Adjective	Verb	Adverb
stand firm	No	No	Yes	No
oppose	No	No	Yes	No

As verbs, oppose is a hypernym of stand firm; that is, oppose is a word with a broader meaning than stand firm:

Other hypernyms of stand firm include defend, fight, fight back, fight down.

stand firm (verb)	oppose (verb)
refuse to abandon one's opinion or belief	be resistant to
stand up or offer resistance to somebody or something	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