Incompatible means that two things are not in harmony with one another, and antonyms for it would be terms that indicate the opposite. Some examples of antonyms for incompatibility are compatibility, harmony, consistency, agreement, and suitability. When two things are compatible, they work well together and create a positive outcome. Harmony is a feeling of peacefulness and cooperation between people or things. Consistency refers to a situation where things remain the same and do not change. Agreement means that two people or objects have reached a mutual understanding, and suitability indicates that something is suitable or appropriate for a particular situation. By knowing these antonyms, one can mostly use them in sentences to make their writing more diverse in vocabulary.