Plural of “mongoose”

The plural of mongoose is mongooses.

Why

"Mongoose" comes from Marathi "mangus," via Portuguese, describing the small, agile carnivore famous for fighting venomous snakes. Despite ending in a syllable that looks exactly like "goose," the animal name has no etymological connection to the bird at all, and English pluralizes it as a regular noun, "mongooses," rather than following "goose"'s irregular vowel-shift pattern to "mongeese."

This is one of the more famous cases of a false folk-etymology trap in English: the word's ending simply happens to resemble "goose" by coincidence of sound, since "mongoose" is an unrelated South Asian loanword with a completely separate origin, and "mongeese" is treated by every major dictionary as a clear, if understandable, error rather than a legitimate variant. The animal became broadly familiar to English-speaking audiences partly through Rudyard Kipling's story "Rikki-Tikki-Tavi," which likely reinforced the word's spelling and everyday recognition even among readers who had never encountered a live mongoose.

Usage note

Stick with "mongooses" whether you're writing a nature documentary script or just chatting about the zoo; "mongeese" has no real currency anywhere despite looking, at a glance, like it should.

Mongooses were introduced to several island ecosystems, including Hawaii and parts of the Caribbean, specifically to control rat populations in sugarcane fields, but the mongooses often failed to control the nocturnal rats effectively, since mongooses are primarily active during the day, and instead caused serious ecological damage by preying on native birds and other wildlife, a well-documented cautionary case in invasive-species biology. Several distinct mongoose species exist across Africa and Asia, ranging from solitary hunters to highly social species that live in large cooperative groups, a degree of behavioral diversity that surprises many people familiar with the animal mainly through its reputation as a snake-fighter.

Common real mistakes

Linguists cite the "mongeese" mistake constantly as a textbook case of false analogy, where a word's purely coincidental resemblance to an unrelated irregular noun tempts writers into borrowing that noun's irregular pattern for no historically valid reason at all. Once that specific trap is sidestepped, the word gives almost no further trouble.

The wider pattern

"Mongoose" is frequently paired with "moose" in discussions of English plural traps, since both end in syllables resembling other, unrelated irregular nouns ("goose" and, coincidentally, nothing for "moose" itself, which is a genuine zero plural); "mongoose" specifically illustrates how a coincidental sound resemblance can mislead writers into inventing a nonstandard irregular plural that has no historical basis at all.

Examples

• The documentary followed several mongooses hunting near the riverbank.
• Farmers once released mongooses to control the rat population.
• Several mongooses were spotted darting through the underbrush.
• The zoo's mongooses are fed a diet resembling their natural prey.
• Wildlife officials now consider mongooses an invasive species on the island.
• The children were fascinated by the mongooses at the sanctuary.
• Researchers study how mongooses cooperate to defend their burrows.
• Several species of mongooses live in complex social groups.
• The naturalist photographed mongooses confronting a venomous snake.
• Conservationists debated how to manage the growing mongoose population.
• The sanctuary rescued several mongooses from the illegal pet trade.
• Local farmers still credit mongooses with keeping snake populations down.
• The field guide described three mongoose species native to the region.
• Researchers tagged mongooses to study their territorial behavior.
• The children's book featured a brave mongoose battling a cobra.
• Wildlife cameras captured mongooses raiding a termite mound.
• The reserve monitors how mongooses interact with local bird populations.
• The park ranger warned hikers about aggressive mongooses near the trail.
• Conservationists worked to protect native species threatened by mongooses.
• The zookeepers separated the mongooses during feeding time.
• Villagers welcomed the mongooses as natural pest control.
• The documentary crew filmed mongooses defending their den.
• Farmers reported fewer snakes after the mongooses moved in.