grain vs scruple

grain and scruple both are nouns.

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

grain (noun)	scruple (noun)
the direction, texture, or pattern of fibers found in wood or leather or stone or in a woven fabric	an ethical or moral principle that inhibits action
the physical composition of something (especially with respect to the size and shape of the small constituents of a substance)	uneasiness about the fitness of an action (particularly for reasons of ethics, morals or propriety)
the smallest possible unit of anything	a unit of apothecary weight equal to 20 grains
foodstuff prepared from the starchy grains of cereal grasses
a relatively small granular particle of a substance
dry seed-like fruit produced by the cereal grasses: e.g. wheat, barley, Indian corn
a cereal grass
1/7000 pound; equals a troy grain or 64.799 milligrams
1/60 dram; equals an avoirdupois grain or 64.799 milligrams
a weight unit used for pearls or diamonds: 50 mg or 1/4 carat
the side of leather from which the hair has been removed

grain (verb)	scruple (verb)
form into grains	have doubts about
become granular	raise scruples
thoroughly work in	hesitate on moral grounds
paint (a surface) to make it look like stone or wood