qualm vs scruple

qualm and scruple both are nouns.

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

As nouns, qualm and scruple are synonyms defined as:

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

Other synonyms of qualm include misgiving.

qualm (noun)	scruple (noun)
uneasiness about the fitness of an action (particularly for reasons of ethics, morals or propriety)	an ethical or moral principle that inhibits action
a mild state of nausea	uneasiness about the fitness of an action (particularly for reasons of ethics, morals or propriety)
	a unit of apothecary weight equal to 20 grains