Unfavorable is a word that describes something not approved or welcomed. For this reason, it is important to find synonyms that can be used in different contexts and situations. Some of the synonyms for unfavorable are negative, adverse, against, hostile, disagreeable, detrimental, unpleasant, unfriendly, and disadvantageous. These synonyms can be used interchangeably depending on the tone and context of the sentence. Negative is often used to describe unfavorable circumstances, while adverse can be used to describe a situation with damaging consequences. Hostile and unfriendly are used to describe negative attitudes towards someone or something, while detrimental and disadvantageous describe an unfavorable outcome or consequence.