ugly
beautiless
blemished
blotted
cacophonic
cacophonous
defaced
disagreeable
disfigured
displeasing
dysphemistic
dysphemized
homely
ill-tempered
inelegant
marred
plain
short on looks
spoiled
uglified
ugly as hell
ugly as sin
unaesthetic
unattractive
unbeautiful
uncomely
unhandsome
unpleasant
unpleasing
unpretty
unsightly
cheerless
desolate
dingy
hateful
inhospitable
repellent
repulsive
sombre
sordid
squalid
unbecoming
uninteresting
uninviting
unlovable
unpromising
unsatisfactory