Added 10 October 2026 tax-deductible adjective Categories: Obscure Words adjective ! Definition from Wiktionary (CC BY-SA). More about tax-deductible at Wordnik → Where our words come from → That is exempt from payment of income tax. Related Words: deductibleallowabletax-freetax-exemptnondeductiblenonexemptnontaxableuntaxeduntaxablenon-taxableduty-freenontaxpaying Back to today's word