I don't think there is a real synonym. Sometimes bad is used in the sense of inappropriate or unfortunate. In a few cases wicked or even evil might be synonyms. Some other synonyms would include defective, deficient, rough, stinking, and cheap.
Synonyms : poor , inferior , deficient , flawed , faulty , defective , substandard , imperfect, abysmal
very bad
Awful, horrible, and bad.
infamous, well-known (in a bad way).
May be evil as far as you are judging ones personality.
According to the Thesaurus there are none. === "existed" works in some cases, Example; A bad odor was in the room == A bad odor existed in the room.
very bad
A synonym for gullible is naive, credulous, or easily deceived.
because when the cloning is bad to you that it is bad .
synonym of digruntled is bad tempered while antonym is enjoy
A person of ill repute has a bad reputation.
poor leader
junky
Awful, horrible, and bad.
Bad, uncomfortable, and discomfort are synonyms.
bad, beastly
mischievous, immoral, harmful, poor quality
not good