The word "mouth" refers to the opening at the lower part of the face, which is used for various purposes like eating, speaking, and breathing. However, when it comes to expressing the same idea with different words, we have a variety of synonyms to choose from. Some synonyms of "mouth" include "lips," "oral cavity," "chops," "gob," "yap," "piehole," "mug," "trap," "mandible," "jaws," and "gullet." Each of these words carries different connotations and can be used appropriately based on the context. For instance, "lips" can be used when referring to the physical features of the mouth, while "trap" can be used to describe someone with a big, loud mouth.