stand still vs mire

stand still is not a noun while mire is a noun.

Word	Noun	Adjective	Verb	Adverb
stand still	No	No	Yes	No
mire	Yes	No	Yes	No

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

Other hyponyms of stand still include freeze, stop dead, bog down, get stuck, grind to a halt.

stand still (noun)	mire (noun)
	a soft wet area of low-lying land that sinks underfoot
	a difficulty or embarrassment that is hard to extricate yourself from
	deep soft mud in water or slush

stand still (verb)	mire (verb)
remain in place; hold still; remain fixed or immobile	soil with mud, muck, or mire
	be unable to move further
	cause to get stuck as if in a mire
	entrap