scruples vs sense of right and wrong

scruples and sense of right and wrong both are nouns.

Word	Noun	Adjective	Verb	Adverb
scruples	Yes	No	No	No
sense of right and wrong	Yes	No	No	No

As nouns, scruples and sense of right and wrong are synonyms defined as:

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

Other synonyms of scruples include conscience, moral sense.

scruples (noun)	sense of right and wrong (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