stand firm vs stand

stand firm is not a noun while stand is a noun.

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

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

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

stand firm (noun)	stand (noun)
	a defensive effort
	a stop made by a touring musical or theatrical group to give a performance
	a support or foundation
	tiered seats consisting of a structure (often made of wood) where people can sit to watch an event (game or parade)
	a platform where a (brass) band can play in the open air
	a support for displaying ot holding various articles
	a small table for holding articles of various kinds
	a booth where articles are displayed for sale
	a mental position from which things are viewed
	an interruption of normal activity
	a growth of similar plants (usually trees) in a particular area
	the position where a thing or person stands

stand firm (verb)	stand (verb)
refuse to abandon one's opinion or belief	put up with something or somebody unpleasant
stand up or offer resistance to somebody or something	have or maintain a position or stand on an issue
	withstand the force of something
	be standing; be upright
	put into an upright position
	be available for stud services
	hold one's ground; maintain a position; be steadfast or upright
	be tall; have a height of; copula
	be in effect; be or remain in force
	occupy a place or location, also metaphorically
	be in some specified state or condition
	remain inactive or immobile