Teratoid is a term that refers to something that has the characteristics of a monster or deformity. Its opposite, or antonym, would be something that is normal, regular, or average. A few examples of antonyms for teratoid are usual, typical, standard, ordinary, and natural. These terms denote regularity, cleanliness, or conformity, representing the opposite of twisted or sometimes bizarre forms of teratoid. Some other antonyms that could describe what is not teratoid are healthy, balanced, symmetrical, or unconcerned. Antonyms for teratoid are helpful in describing something that is considered normal or average, rather than unique or extreme.