moral sense vs scruples

moral sense and scruples both are nouns.

Word	Noun	Adjective	Verb	Adverb
moral sense	Yes	No	No	No
scruples	Yes	No	No	No

As nouns, moral sense and scruples are synonyms defined as:

moral sense and scruples: motivation deriving logically from ethical or moral principles that govern a person's thoughts and actions

Other synonyms of moral sense include conscience, sense of right and wrong.

moral sense (noun)	scruples (noun)
motivation deriving logically from ethical or moral principles that govern a person's thoughts and actions	motivation deriving logically from ethical or moral principles that govern a person's thoughts and actions