psychic phenomenon vs psychic phenomena

psychic phenomenon and psychic phenomena both are nouns.

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

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

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

Other synonyms of psychic phenomenon include parapsychology.

psychic phenomenon (noun)	psychic phenomena (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