hold out vs remain firm

hold out and remain firm both are verbs.

Word	Noun	Adjective	Verb	Adverb
hold out	No	No	Yes	No
remain firm	No	No	Yes	No

As verbs, remain firm is a hyponym of hold out; that is, remain firm is a word with a more specific, narrower meaning than hold out:

hold out: stand up or offer resistance to somebody or something
remain firm: hold one's ground; maintain a position; be steadfast or upright

Other hyponyms of hold out include stand out, stand up, outbrave, hold off, stand, defy, hold, hold up, withstand.

hold out (verb)	remain firm (verb)
thrust or extend out	hold one's ground; maintain a position; be steadfast or upright
stand up or offer resistance to somebody or something
continue to live and avoid dying
last and be usable
wait uncompromisingly for something desirable