ugly

adj.

[1]	unattractive , unlovely , unprepossessing , unsightly , hideous , grotesque , gruesome , ghastly , offensive , repulsive-looking , plain , plain-looking , plain-featured , bad-featured , ill-favoured , dreadful-looking , awful-looking , terrible-looking , horrible-looking , frightful-looking , monstrous-looking , (US/Canadian) homely
[2]	objectionable , surly , disagreeable , unpleasant , offensive , nasty , loathsome , repellent , repugnant , repulsive , noisome , nauseating , nauseous , revolting , sickening , disgusting , obnoxious , mephitic , rotten , corrupt , filthy , vile , heinous , bad , sordid , evil , foul , perverted , immoral , depraved , degenerate , base , debased , detestable , hateful , abominable , execrable , despicable , odious
[3]	disquieting , despicable , vile , uncomfortable , discomforting , slimy , unworthy , troublesome , awkward , worthless , wretched , disadvantageous , ominous , dangerous , perilous , hazardous
[4]	unpleasant , atrocious , frightful , disagreeable , surly , horrifying , horrible , hostile , nasty , spiteful , bad-tempered , ill-tempered , currish , irascible , curmudgeonly , cantankerous , crabby , crabbed , crotchety , cross , cranky , mean