Synonyms of hateful

1 Syllable
foul, cruel, vile, mean, dang, gross, fouls, nar
2 Syllables
crueler, piller, heinous, odious, heeler, blasted, cussed, bitchy, uncool, cattier, awful, angry, dratted, cattish, bitter, currish, spleenful, angrier, evil, lousy, catty, angriest, foulest, maligns, shocking, fouled, horrid, pesky, damned, bitchier, cursed, cruelest, unkind, vicious, lousier, feller, fouler, short-fuse, hideous, malign, scurvy
3 Syllables
loathsome, damnable, hostile, spiteful, racialist, ornery, revolting, repellent, maligning, forbidding, villainous, ill-famed, obnoxious, coldblooded, ungenial, horrendous, disgusting, accursed, terrible, malefic, infamous, unfriendly, confounded, invidious, off-putting, sleazeball, hateable, inhuman, abhorrent, offputting, hidebound, repugnant, resentful, worked-up
4 Syllables
contemptible, shuddersome, detestable, unindulgent, abrasive, repulsive, execrable, inhumane, pestiferous, maleficent, offensive, despiteful, distasteful, narrowminded, despicable, malevolent, intolerant, unneighborly, xenophobic, chauvinistic
5 Syllables
unconformable, abominable, undesirable