The term "out-wearing" refers to the act of wearing something until it becomes worn out or unusable. There are several synonyms for this word, including "wearing out," "wearing down," "exhausting," "depleting," and "using up." Other alternatives include "consuming," "draining," "depleting," "exhausting," "emptying," "sapping," and "spending." These synonyms imply that something is being used to such an extent that it is becoming worn or depleted. These words can be applied to anything that becomes worn out through usage, whether it be clothing, machinery, or other physical items that experience wear and tear over time.