cathexis vs libidinal energy

cathexis and libidinal energy both are nouns.

Word	Noun	Adjective	Verb	Adverb
cathexis	Yes	No	No	No
libidinal energy	Yes	No	No	No

As nouns, libidinal energy is a hypernym of cathexis; that is, libidinal energy is a word with a broader meaning than cathexis:

cathexis: (psychoanalysis) the libidinal energy invested in some idea or person or object
libidinal energy: (psychoanalysis) psychic energy produced by the libido

cathexis (noun)	libidinal energy (noun)
(psychoanalysis) the libidinal energy invested in some idea or person or object	(psychoanalysis) psychic energy produced by the libido