raucous vs strident

raucous and strident both are adjectives.

Word	Noun	Adjective	Verb	Adverb
raucous	No	Yes	No	No
strident	No	Yes	No	No

As adjectives, raucous and strident are synonyms defined as:

raucous (adjective)	strident (adjective)
unpleasantly loud and harsh	unpleasantly loud and harsh
disturbing the public peace; loud and rough	being sharply insistent on being heard
	conspicuously and offensively loud; given to vehement outcry
	of speech sounds produced by forcing air through a constricted passage (as `f', `s', `z', or `th' in both `thin' and `then')