loins vs groin

loins and groin both are nouns.

Word	Noun	Adjective	Verb	Adverb
loins	Yes	No	No	No
groin	Yes	No	Yes	No

loins (noun)	groin (noun)
the lower part of the abdomen just above the external genital organs	a protective structure of stone or concrete; extends from shore into the water to prevent a beach from washing away
the region of the hips and groin and lower abdomen	a curved edge formed by two intersecting vaults
	the crease at the junction of the inner part of the thigh with the trunk together with the adjacent region and often including the external genitals

loins (verb)	groin (verb)
	build with groins