Based on roset, new words formed by adding one letter at the beginning or end:
aeorst   boaters   corates   dsorbet   estrobe   fcorset   gcoster   hescort   irectos   kscoter   lsector   mdoters   nsorted   ostored   pstrode   rstereo   sfetors   tfortes   ufoster   vsofter   wergots   xhorste   yothers   zreshot