Letters that make invalidating
a, d, g, l, n, t, i, v are letters that make 'invalidating'
Words within invalidating
DAT, lid, id, ti, ting, VA, IDA, DA, Ali, at, ng, invalid, valid, li, validating, in, dating, tin, AL, ID, IN, NV, Vali, Al, At, In, Li, Ti are words within 'invalidating'