Letters that make invalidate
a, d, e, l, n, t, i, v are letters that make 'invalidate'
Words within invalidate
DAT, lid, id, te, date, VA, IDA, DA, Ali, at, invalid, valid, li, in, AL, ID, IN, NV, Ate, Vali, Al, At, In, Li, Te, validate are words within 'invalidate'