The term "re-stamps" refers to the act of stamping something again. However, there are several synonyms you can use in place of "re-stamps" when writing or speaking. Consider using alternatives like "reimprints," "reissues," "reprints," "dupe stamps," or "copy stamps." Each of these words effectively communicates the idea of stamping something again, whether it's a document, envelope, or package. To add more variety to your writing or speech, you can also use more specific terms like "cancel stamp," "used stamp," or "postmark." Utilizing a variety of synonyms not only makes your writing more interesting but also helps you to avoid repetition.