Vocabulary List N° 3: Irregular Plurals in English

Flashcards reviewing irregular plurals, Greek and Latin derivations, invariant nouns, plural-only nouns, and specialized usage distinctions from Vocabulary List N° 3.

Ox

plural form is oxen.

Louse

irregular plural form is lice.

Scarf

A noun ending in -f that accepts two acceptable plural spellings: scarves or scarfs.

Analysis

A Greek-origin singular noun whose plural form is analyses.

Crisis

plural form is crises.

Thesis

plural form is theses.

Hypothesis

plural form is hypotheses.

Diagnosis

plural form is diagnoses.

Basis

plural form is bases.

Axis

plural form is axes.

Phenomenon

plural form is phenomena.

Criterion

plural form is criteria.

Datum

plural form is data.

Medium

plural form is media.

Bacterium

plural form is bacteria.

Curriculum

plural form is curricula.

Memorandum

plural form can be memoranda or memorandums.

Stimulus

plural form is stimuli.

Nucleus

plural form is nuclei.

Alumnus

plural form is alumni.

Alumna

plural form is alumnae.

Formula

plural form can be formulae or formulas.

Index

plural form can be indices or indexes.

Appendix

plural form can be appendices or appendixes.

Usage of 'Politics'

politics

People

peoples