lower-class vs blue-collar

lower-class and blue-collar both are adjectives.

Word	Noun	Adjective	Verb	Adverb
lower-class	No	Yes	No	No
blue-collar	No	Yes	No	No

lower-class (adjective)	blue-collar (adjective)
occupying the lowest socioeconomic position in a society	of or designating manual industrial work or workers
	of those who work for wages especially manual or industrial laborers