Phonetic units refer to the basic sounds that make up a language. These sounds include phonemes, syllables, and morphemes. Synonyms for phonetic units include speech sounds, phonology, phonetic symbols, articulatory features, and linguistic units. Speech sounds, also known as sounds, refer to the audible manifestations of phonetic units. Phonology refers to the study of speech sounds and their patterns. Phonetic symbols are the written representations of speech sounds, while articulatory features describe how speech sounds are produced by the mouth and vocal cords. Linguistic units refer to the smallest units of language, including phonetic units, that can affect meaning and be combined to form larger units.