Kamini scored 100 off 146 balls to become the first Indian eve to notch up a century in 50-over World Cup as the hosts piled up a commendable 284 for six after being sent into bat.
Defending the total, Nagarajan Niranjana (3/52), Jhulan Goswami (2/13) and left-arm spinner Gouher Sultana (2/38) starred with the ball to help India bundle out the Caribbean side for 179 runs with 5.3 overs to spare.
West Indies run chase never really got off as they lost wickets at regular intervals. Opener Kycia Knight, one of the twin sister in the team, was dismissed in the second ball of the innings after she was run out by a direct hit from Harmanpreet Kaur.
West Indies then other opener Stafanie Taylor in the first ball of the sixth over after she edged one to wicket-keeper Karuna Jain off Amita Sharma's bowling.
Niranjana then castled the timbers of Shemaine Campbelle with an in swinger to reduce the West Indies to 38 for three.
Deandra Dottin then took the attack to the opposition with a 16-ball 39-run blitzkrieg which was studded with four sixes and three fours.
The 21-year old West Indian clobbered Niranjana for two sixes and a four in the 19th over before the pacer took her revenge by trapping Dottin plumb in front of the wicket in the same over.
Kyshona Knight (11) was then bowled by Sultana in the next over as West Indies lost half of the side back with just 84 runs on the board.