Synonyms for Ill-bred:

adj.

boorish (adjective)
impolite, ungracious, lowbred, tasteless, unpolished, vulgar, churlish, uncultured, clumsy, uncivilized, gross, uncouth, barbaric, coarse, rude, rough, unrefined.
crude (adjective)
raw, tactless, boorish, barnyard, crass, earthy, inelegant, obscene, cheap, indelicate.
discourteous (adjective)
crude, disrespectful.
disrespectful (adjective)
discourteous, profane.
gauche (adjective)
graceless.
indecent (adjective)
unbecoming, shameless, unseemly, in bad taste.
low (adjective)
degraded, base, common, undignified, ignoble, offensive, depraved, sordid.
philistine (adjective)
low.
uncivilized (adjective)
brutish, barbarian, philistine, uncultivated.
vulgar (adjective)
tawdry, unbecoming, ignoble, low, profane, boorish, idiomatic, coarse-grained, homespun, broad, scandalous, offensive, cheap, indelicate, sordid, unrefined, barbaric, common, brutish, unpolished, coarse, cockney, graceless, gaudy, clumsy, chintzy, philistine, revolting, glaring, raw, earthy, animal, brazen, tasteless, barnyard, outlandish, unseemly, shameless, crass, obscene, base, repulsive, ignominious, in bad taste, rude, gross, undignified, inelegant, rough, colloquial, tactless, degraded, crude, rank, depraved, sleazy, vulgar, garish, salty.

n.

disrespectful, discourteous, impolite, ungracious. ill-bred (noun)
bounderish, underbred, rude, unrefined, yokelish, lowbred.

Other synonyms:

churlish, uncouth, impolite, uncultured, ungracious, discourteous. disrespectful, barbarian, uncivilized, uncultivated. Other relevant words:
disrespectful, yokelish, ungracious, uncouth, uncultured, uncivilized, lowbred, impolite, uncultivated, underbred, churlish, barbarian, bounderish, discourteous.