Synonyms For "Loathsome" :

1 syllable:

foul, vile

2 syllables:

loathly, nauseous, noisome, queasy, skanky, wicked, yucky

3 syllables:

disgustful, disgusting, distasteful, offensive, repellant, repellent, repelling, revolting, sickening, unwholesome

4 syllables:

nauseating