The crossword solution for the term PLURALIZER is ESS. A pluralizer is a tool used to convert singular words into their plural form. It is often used in grammar and linguistics to help people understand the rules of forming plurals. The term ESS is an abbreviation for the word 'ESSENCE, ' which is the core or fundamental nature of something. Therefore, the term ESS when used as a pluralizer refers to the ESSENCE of a word, which is its plural form.