quiet vs placate

quiet is a noun but placate is not a noun.

Word	Noun	Adjective	Verb	Adverb
quiet	Yes	Yes	Yes	Yes
placate	No	No	Yes	No

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

Other hyponyms of quiet include lull, compose, appease, assuage, conciliate, gentle, gruntle, lenify, mollify, pacify.

quiet (noun)	placate (noun)
a disposition free from stress or emotion
the absence of sound
a period of calm weather
an untroubled state; free from disturbances

quiet (adjective)	placate (adjective)
free of noise or uproar; or making little if any sound
characterized by an absence or near absence of agitation or activity
(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
in a softened tone
not showy or obtrusive

quiet (verb)	placate (verb)
make calm or still	cause to be more favorably inclined; gain the good will of
become quiet or quieter

quiet (adverb)	placate (adverb)
with little or no activity or no agitation (`quiet' is a nonstandard variant for `quietly')