Nouns of Foreign Origin in English
In English there is a group of nouns with very unusual plural forms. This group consists mainly of nouns of foreign origin especially of Latin and Greek. Below you can find a list with some examples of such nouns.
| Singular | Plural |
|---|---|
| analysis | analyses |
| antenna | antennae / antennas |
| appendix | appendixes/appendices |
| axis | axes |
| bacterium | bacteria |
| basis | bases |
| bureau | bureaux |
| cactus | cactuses/cacti |
| codex | codices |
| criterion | criteria |
| crisis | crises |
| curriculum | curricula |
| datum | data |
| diagnosis | diagnoses |
| focus | focuses/foci |
| formula | formulae / formulas |
| fungus | fungi |
| index | indexes/indices |
| kibbutz | kibbutzim |
| larva | larvae |
| medium | mediums/media |
| nucleus | nuclei |
| oasis | oases |
| octopus | octopuses/octopi |
| phenomenon | phenomena |
| stimulus | stimuli |
| syllabus | syllabuses/syllabi |
| tempo | tempi |
| terminus | termini / terminuses |
| thesis | theses |