The word "nonconventional" refers to anything that is not traditional or widely accepted. Its antonyms, on the other hand, are words that describe things that conform to societal norms and expectations. Some antonyms for "nonconventional" can include conventional, traditional, conformist, orthodox, and standard. These words imply that something is ordinary, typical, or in agreement with established norms. For instance, a nonconventional wedding might be held outdoors or involve non-traditional attire, while a conventional wedding would be held in a church with traditional attire. In summary, the antonyms for "nonconventional" describe things that are usual, expected, or normal.