Synonyms For "Dirtier" :
1 syllable:
black, blue, foul, fouled, grime, lewd, soil, soiled
2 syllables:
awful, bawdy, befouled, begrime, begrimed, buggy, cheating, colly, cruddy, dingy, draggled, filthy, flyblown, greasy, grimy, grubby, grungy, lousy, mucky, muddied, muddy, nasty, obscene, oily, profane, ratty, raunchy, ribald, scabrous, scummy, shoddy, smudgy, smutty, snotty, sooty, sordid, squalid, unclean, unswept, unwashed
3 syllables:
bedraggled, bemire, blasphemous, cobwebby, feculent, indecent, maculate, salacious, uncleanly, unsporting, untidy