Letters that make principal diagonal
a, o, d, g, l, n, p, c, r, i are letters that make 'principal diagonal'
Words within principal diagonal
PA, IP, PR, DIA, INC, principal, Ag, Ci, Pa, RI, go, diagonal, on, ago, ci, agonal, in, agon, AL, IN, IA, NC, Iago, pal, pa, Al, In, Pr, Na are words within 'principal diagonal'