Based on terse, new words formed by adding one letter at the beginning or end:
a - eerst b - aretes c - easter d - eaters f - reseat g - seater h - teaser i - berets j - certes k - erects l - resect m - secret n - terces o - desert p - deters r - rested s - freest t - egrets u - greets v - ethers w - theres x - threes y - resite z - reties
