Which term corresponds to sounds produced when two parts of the body come together, such as the lips?

Labial sounds are produced when the lips come together to create a sound. This term specifically refers to any phoneme in which the lips play a key role in articulation. For instance, in English, sounds like "p," "b," and "m" are considered labial sounds because they are articulated with the lips coming together or nearing one another.

Other terms do not describe the action of the lips in sound production. Nasalization refers to the process where airflow through the nose is involved during the articulation of certain sounds, but it does not specifically relate to lip movement. Phonetics is the study of sounds in human speech but does not pertain directly to sounds produced by the lips. Aspiration refers to the burst of breath that accompanies certain sounds, such as the "p" in "pat," and is more about airflow than lip articulation.