singularize
singularize words, uses global inflector from inflections @nathanfaucett/inflections
var singularize = require("@nathanfaucett/singularize"),
inflections = require("@nathanfaucett/inflections");
var en = inflections("en");
en.singular(/s$/i, "");
en.singular(/(ch|sh|ss|[sxz])es$/i, "$1");
en.singular(/([^aeiouy])ies$/i, "$1y");
singularize("words") === "word";
singularize("skies") === "sky";
singularize("boxes") === "box";