Based on ar, new words formed by adding one letter at the beginning or end:
b - arb bar bra c - arc car d - rad e - are ear era f - arf far g - gar rag h - rah i - air ria j - jar raj k - ark l - lar m - arm mar ram n - ran o - oar ora p - par rap s - ars ras t - art rat tar v - var w - raw war x - rax y - ray rya yar
