Map of nouns to their irregular plural form

An irregular plural in this library is defined as a noun that cannot be made plural by applying these rules:

• If the noun ends in an "s", "x", "z", "ch" or "sh", add "es"
• If the noun ends in a "y" and is preceded by a consonant, drop the "y" and add "ies"
• If the noun ends in a "y" and is preceded by a vowel, add "s"

The list is just a JSON file and can be used anywhere.

$ npm install irregular-plurals

const irregularPlurals = require('irregular-plurals');

console.log(irregularPlurals.get('cactus'));
//=> 'cacti'

console.log(irregularPlurals);
/*
Map {
	[addendum, 'addenda'],
	[alga, 'algae'],
	…
}
*/

• plur - Pluralize a word