Nouns

(n)use, usage, utilization, utilisation, employment, exercisethe act of using“he warned against the use of narcotic drugs”, “skilled in the utilization of computers”
(n)custom, usage, usanceaccepted or habitual practice
(n)usagethe customary manner in which a language (or a form of a language) is spoken or written“English usage”, “a usage borrowed from French”