superego vs scruples

superego and scruples both are nouns.

Word	Noun	Adjective	Verb	Adverb
superego	Yes	No	No	No
scruples	Yes	No	No	No

As nouns, scruples is a hypernym of superego; that is, scruples is a word with a broader meaning than superego:

superego: (psychoanalysis) that part of the unconscious mind that acts as a conscience
scruples: motivation deriving logically from ethical or moral principles that govern a person's thoughts and actions

Other hypernyms of superego include conscience, moral sense, sense of right and wrong.

superego (noun)	scruples (noun)
(psychoanalysis) that part of the unconscious mind that acts as a conscience	motivation deriving logically from ethical or moral principles that govern a person's thoughts and actions