Letters that make first-degree burn
s, b, d, e, f, g, n, r, t, i, u are letters that make 'first-degree burn'
Words within first-degree burn
urn, degree, re, IRS, IR, RN, fir, bur, EE, first, burn, Ur, DE, Re, Ir, Rn are words within 'first-degree burn'