precognition vs second sight

precognition and second sight both are nouns.

Word	Noun	Adjective	Verb	Adverb
precognition	Yes	No	No	No
second sight	Yes	No	No	No

As nouns, second sight is a hypernym of precognition; that is, second sight is a word with a broader meaning than precognition:

precognition: knowledge of an event before it occurs
second sight: apparent power to perceive things that are not present to the senses

Other hypernyms of precognition include clairvoyance, E.S.P., ESP, extrasensory perception.

precognition (noun)	second sight (noun)
knowledge of an event before it occurs	apparent power to perceive things that are not present to the senses