Similar word to base:

abject, abominable, cheap, coarse, common, contemptible, corrupt, depraved, despicable, disgraceful, dishonorable, disreputable, foul, grovelling, humble, ignoble, immoral, indelicate, loathsome, lowly, mean, menial, offensive, paltry, pitiful, plebeian, poor, scandalous, servile, shameful, shoddy, sleazy, sordid, sorry, squalid, trashy, ugly, unworthy, vile, worthless, wretched