The word "teratoid" refers to something resembling a monster or a deformity. Using synonyms for this word can help to add depth and variation to your writing. Some possible alternatives might include "monstrous," "grotesque," "deformed," "aberrant," "anomalous," "mutant," "abnormal," "freakish," "irregular," or "distorted." Each of these words captures a slightly different nuance or shade of meaning, which can help to emphasize different aspects of the object or idea being described. Experiment with these and other synonyms to create a richer, more vivid vocabulary in your writing.