Letters that make difference threshold
s, o, d, e, f, l, n, c, h, r, t, i are letters that make 'difference threshold'
Words within difference threshold
threshold, ER, RES, resh, re, difference, en, thresh, old, Old, CE, hold, NC, Re, Ce, Es, Er, Ho, Fe, Th, hr, differ are words within 'difference threshold'