vulgar vs uncouth

vulgar and uncouth both are adjectives.

Word	Noun	Adjective	Verb	Adverb
vulgar	No	Yes	No	No
uncouth	No	Yes	No	No

As adjectives, vulgar and uncouth are synonyms defined as:

Other synonyms of vulgar include coarse, common, rough-cut.

vulgar (adjective)	uncouth (adjective)
conspicuously and tastelessly indecent	lacking refinement or cultivation or taste
of or associated with the great masses of people
lacking refinement or cultivation or taste
being or characteristic of or appropriate to everyday language