allomorph

/ˈæl.ə.mɔrf/
noun
  1. One of two or more different forms of a morpheme (the smallest unit of meaning in a language).
    • The plural '-s' in English has allomorphs like /s/, /z/, and /ɪz/.
    • Linguists study allomorphs to understand how sounds change in different word contexts.
    • The past tense morpheme '-ed' has allomorphs such as /t/, /d/, and /ɪd/.
Synonyms
What does "allomorph" mean? | whatsthatwordmean | whatsthatwordmean