The term 'HISSING SOUND' can be represented by a variety of words, including 'SIBILANT' (8 letters), 'Sibilance' (9 letters), 'SWISH' (5 letters), 'HISS' (4 letters), 'SSS' (3 letters), and 'Siss' (4 letters). A SIBILANT sound is a type of consonant sound that is produced by air being forced through a narrow channel in the mouth, such as when pronouncing the letter 's'. Sibilance is a type of alliteration that occurs when multiple words with SIBILANT sounds are used in close proximity. A SWISH is a hissing sound made when something moves quickly through the air. A HISS is a sharp, loud sound made by forcing air through a small opening. 'SSS' and 'Siss' are both onomatopoeic words used to represent the sound of a HISS.