Letters that make typographical error
a, o, e, g, l, p, c, h, r, t, i, y are letters that make 'typographical error'
Words within typographical error
ER, OR, hi, typo, PO, IC, phi, graph, typographic, pH, Ro, graphic, ic, graphical, typographical, error, rap, RA, AL, CA, HI, Po, Ra, Al, Ca, Er, err are words within 'typographical error'