misgiving vs scruple

misgiving and scruple both are nouns.

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

As nouns, misgiving and scruple are synonyms defined as:

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

Other synonyms of misgiving include qualm.

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