placid vs unruffled

placid and unruffled both are adjectives.

Word	Noun	Adjective	Verb	Adverb
placid	No	Yes	No	No
unruffled	No	Yes	No	No

As adjectives, placid and unruffled are synonyms defined as:

placid and unruffled: (of a body of water) free from disturbance by heavy waves

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

placid (adjective)	unruffled (adjective)
(of a body of water) free from disturbance by heavy waves	(of a body of water) free from disturbance by heavy waves
not easily irritated	free from emotional agitation or nervous tension