Based on lear, new words formed by adding one letter at the beginning or end:
a - aelr b - areal c - baler d - blear e - carle f - clear g - lacer h - alder i - lader k - laree m - farle n - feral p - argle s - glare t - large u - regal v - haler w - ariel x - laker y - lamer
