The term 'ONETIME ITEM' can be solved by the word 'EXES', which is a four-letter word. The term 'EXES' is a plural noun that refers to two people who were once in a romantic relationship but are no longer together. It is often used to refer to former spouses or partners. In this context, 'ONETIME ITEM' could refer to something that was only shared between the two people during their relationship, such as a special gift or memory.