Vulgar is synonymous of ordinary and clumsy. That lack of culture, distinction or novelty. Belonging to the vulgar (lower stratum of population less educated).Prosaic is synonymous of vulgar, bland, lacking of elevation or interest. Concerning the prose (ordinary form of language).
VULGAR: Belonging to the vulgar-which is improper of cultured and educated-that people has no particular speciality line-which is common or general-such a language, currently spoken as opposed to you know languages. PROSAIC: Said of a work, that it lacks prose-such people and things, faults of ideality or elevation.-that is bland and vulgar.