public static function makePlural($singular)
    {
        $singulars = [
            'ey' => 'eys',
            'day' => 'days',
            "ch" => "ches",
            "s" => "ses",
            "x" => "xes",
            "y" => "ies",
        ];

        foreach ($singulars as $singularEnding => $pluralEnding) {
            if (preg_match("/" . $singularEnding . "$/i", $singular)) {
                return preg_replace("/" . $singularEnding . "$/i", $pluralEnding, $singular);
            }
        }

        return $singular . "s";
    }