Based on aster, new words formed by adding one letter at the beginning or end:
a - aerst b - reatas c - baster d - tabers e - carets f - caster g - crates h - recast i - traces k - daters l - derats m - trades n - aretes o - eaters p - reseat r - teaser s - faster t - gaster u - greats v - retags w - targes x - haters y - hearts z - airest
