Verb' (4 letters) The crossword solutions for the TERM PROPER WORD are a noun with four letters and a verb with four letters. The noun is 'TERM' and the verb is 'USED'. A proper word is a word that is USED in its correct context, meaning it is USED in a way that is accepted by society or language. It is also a word that is USED correctly in terms of grammar and spelling. Proper words are important for communication and understanding.