Synonyms For "Immoral" :

1 syllable:

base, fast, wrong

2 syllables:

debauched, evil, shameful, shocking, unchaste, wicked

3 syllables:

decadent, degraded, disgraceful, dissolute, libertine, profligate, riotous, scandalous, scrofulous, unrighteous

4 syllables:

degenerate, dissipated