Pride is the collective noun for a group of lions. Similarly, school is the collective noun for fish. Hence pride is to lion as school is to fish.

Secretly is to openly as silently is to noisily.

Sponge is to porous as rubber is to elastic.

Elated is to despondent as enlightened is to ignorant. Elated means overjoyed and despondent means downhearted (both are antonyms). Hence ignorant is the antonym of enlightened.

Pride is to lion as shoal is to fish. Reason: Pride is the collective noun for a group. Similarly, shoal is a group of fish.