Given a pair of words, deduce the type of relationship between them. The various types of relations are: 'HYPER', 'COORD' and 'RANDOM'. Let's denote the first word by X and the second word by Y. A COORD relationship holds when X and Y belong to the same semantic class. A HYPER relationship applies when X is a specific instance of Y. If niether COORD nor HYPER are applicable then the relationship is RANDOM.
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Question: X: drive, Y: optical

Answer: RANDOM


Question: X: battle, Y: oppose

Answer: HYPER


Question: X: grenade, Y: knife

Answer:
COORD