Nouns

In English there is a group of nouns with very unusual plural form. This group consist mainly of nouns of foreign origin especially of Latin and Greek. Below you can find a list with examples of such nouns.

  • Singular
  • analysis
  • appendix
  • axis
  • bacterium
  • basis
  • cactus
  • criterion
  • crisis
  • datum
  • diagnosis
  • focus
  • formula
  • fungus
  • index
  • medium
  • nucleus
  • oasis
  • octopus
  • phenomenon
  • stimulus
  • syllabus
  • terminus
  • thesis
  • Plural
  • analyses
  • appendixes/appendices
  • axes
  • bacteria
  • bases
  • cactuses/cacti
  • criteria
  • crises
  • data
  • diagnoses
  • focuses/foci
  • formulae / formulas
  • fungi
  • indexes/indices
  • mediums/media
  • nuclei
  • oases
  • octopuses/octopi
  • phenomena
  • stimuli
  • syllabuses/syllabi
  • termini / terminuses
  • theses
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