There are several synonyms that can be used in place of the word "labiodental." Some of these include "lip-tooth," "dental-labial," and "bilabial-dental." These terms all refer to the articulation or production of sounds that involve the lips and teeth. Labiodental sounds are those that are produced by bringing the lower lip into contact with the upper teeth, such as the /f/ and /v/ sounds. These sounds are commonly used in many languages, including English and Spanish. By understanding the various synonyms for the word "labiodental," linguists and language learners can better understand and analyze the sounds and structures of different languages.