second sight vs ESP

second sight and ESP both are nouns.

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

As nouns, second sight and ESP are synonyms defined as:

second sight and ESP: apparent power to perceive things that are not present to the senses

Other synonyms of second sight include clairvoyance, E.S.P., extrasensory perception.

second sight (noun)	ESP (noun)
apparent power to perceive things that are not present to the senses	apparent power to perceive things that are not present to the senses