doublet

ot noun

1. Either of two dice, each of which, when thrown, has the same number of spots on the face lying uppermost. to throw doublets
2. A pair of two similar or equal things; couple.
3. One of two or more different words in a language derived from the same etymological root but having different phonological forms (e.g., toucher and toquer in French or shade and shadow in English).
4. In textual criticism, two different narrative accounts of the same actual event.