ESP vs parapsychology

ESP and parapsychology both are nouns.

Word	Noun	Adjective	Verb	Adverb
ESP	Yes	No	No	No
parapsychology	Yes	No	No	No

As nouns, parapsychology is a hypernym of ESP; that is, parapsychology is a word with a broader meaning than ESP:

ESP: apparent power to perceive things that are not present to the senses
parapsychology: phenomena that appear to contradict physical laws and suggest the possibility of causation by mental processes

Other hypernyms of ESP include psychic phenomena, psychic phenomenon.

ESP (noun)	parapsychology (noun)
apparent power to perceive things that are not present to the senses	phenomena that appear to contradict physical laws and suggest the possibility of causation by mental processes