Vocoid refers to a sound that is produced by the vocal cords with an unimpeded flow of air. The term vocoid is specifically used in phonetics to describe vowel sounds. There are several synonyms for vocoid, such as sonorant, voiced sound, voiced vowel, and vowel sound. Sonorant is used to describe sounds that are produced with the voice box, whereas voiced sound refers to sounds that are produced by the vocal cords. Voiced vowel and vowel sound are more specific synonyms for vocoid and describe sounds produced by the vocal cords that are not obstructed by the lips, tongue, or teeth, and have a distinct pitch.