withstand vs stand firm

withstand and stand firm both are verbs.

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

As verbs, withstand and stand firm are synonyms defined as:

withstand and stand firm: stand up or offer resistance to somebody or something

Other synonyms of withstand include hold out, resist.

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

Other hypernyms of withstand include hold out, resist, withstand.

withstand (verb)	stand firm (verb)
stand up or offer resistance to somebody or something	refuse to abandon one's opinion or belief
resist or confront with resistance	stand up or offer resistance to somebody or something