psychic phenomena vs psychic phenomenon

psychic phenomena and psychic phenomenon both are nouns.

Word	Noun	Adjective	Verb	Adverb
psychic phenomena	Yes	No	No	No
psychic phenomenon	Yes	No	No	No

As nouns, psychic phenomena and psychic phenomenon are synonyms defined as:

psychic phenomena and psychic phenomenon: phenomena that appear to contradict physical laws and suggest the possibility of causation by mental processes

Other synonyms of psychic phenomena include parapsychology.

psychic phenomena (noun)	psychic phenomenon (noun)
phenomena that appear to contradict physical laws and suggest the possibility of causation by mental processes	phenomena that appear to contradict physical laws and suggest the possibility of causation by mental processes