stand still vs bog down

stand still and bog down both are verbs.

Word	Noun	Adjective	Verb	Adverb
stand still	No	No	Yes	No
bog down	No	No	Yes	No

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

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

stand still (verb)	bog down (verb)
remain in place; hold still; remain fixed or immobile	cause to slow down or get stuck
	get stuck while doing something
	be unable to move further
	cause to get stuck as if in a mire