scruple vs misgiving

scruple and misgiving both are nouns.

Word	Noun	Adjective	Verb	Adverb
scruple	Yes	No	Yes	No
misgiving	Yes	No	No	No

As nouns, scruple and misgiving are synonyms defined as:

scruple and misgiving: uneasiness about the fitness of an action (particularly for reasons of ethics, morals or propriety)

Other synonyms of scruple include qualm.

scruple (noun)	misgiving (noun)
an ethical or moral principle that inhibits action	doubt about someone's honesty
uneasiness about the fitness of an action (particularly for reasons of ethics, morals or propriety)	painful expectation
a unit of apothecary weight equal to 20 grains	uneasiness about the fitness of an action (particularly for reasons of ethics, morals or propriety)