The 4th, 5th, 6th, 7th and 8th letter when read, makes a weapon. - Sword
The 1st, 2nd and 8th letter form the end part of a basic computer typing software. -pad
The 3rd and the 4th letters are same.- SS
The first four letters can be understood as an outcome of any exam.- Pass
The 2nd, 3rd and 4th letters make an animal.-Ass
So the eight letter word id Password