allomorph - definition and synonyms

noun [countable] linguistics 

Your browser doesn’t support HTML5 audio

/ˈæləmɔː(r)f/
singularallomorph
pluralallomorphs
  1. one of the forms that a morpheme can have. For example, the plural ending ‘-s’ has three allomorphs: /s/, /z/, and /iz/, as in the wordstrucks’, ‘cars’, and ‘buses’.