quiet vs still

quiet and still both are nouns.

Word	Noun	Adjective	Verb	Adverb
quiet	Yes	Yes	Yes	Yes
still	Yes	Yes	Yes	Yes

As adjectives, quiet and still are synonyms defined as:

quiet and still: (of a body of water) free from disturbance by heavy waves

Other synonyms of quiet include placid, smooth, tranquil, unruffled.

As nouns, still is a hyponym of quiet; that is, still is a word with a more specific, narrower meaning than quiet:

Other hyponyms of quiet include hush, stillness, speechlessness, quietness, soundlessness.

As verbs, quiet and still are synonyms defined as:

Other synonyms of quiet include calm, calm down, lull, quieten, tranquilize, tranquillise, tranquillize.

quiet (noun)	still (noun)
a disposition free from stress or emotion	an apparatus used for the distillation of liquids; consists of a vessel in which a substance is vaporized by heat and a condenser where the vapor is condensed
the absence of sound	a static photograph (especially one taken from a movie and used for advertising purposes)
a period of calm weather	a plant and works where alcoholic drinks are made by distillation
an untroubled state; free from disturbances	(poetic) tranquil silence

quiet (adjective)	still (adjective)
free of noise or uproar; or making little if any sound	not sparkling
characterized by an absence or near absence of agitation or activity	used of pictures; of a single or static photograph not presented so as to create the illusion of motion; or representing objects not capable of motion
(of the sun) characterized by a low level of surface phenomena, such as sunspots	(of a body of water) free from disturbance by heavy waves
(of a body of water) free from disturbance by heavy waves	marked by absence of sound
in a softened tone	not in physical motion
not showy or obtrusive	free from noticeable current

quiet (verb)	still (verb)
make calm or still	cause to be quiet or not talk
become quiet or quieter	make motionless
	make calm or still
	lessen the intensity of or calm

quiet (adverb)	still (adverb)
with little or no activity or no agitation (`quiet' is a nonstandard variant for `quietly')	to a greater degree or extent; used with comparisons
	with reference to action or condition; without change, interruption, or cessation
	without moving or making a sound
	despite anything to the contrary (usually preceding a concession)