coarctation vs constriction

coarctation and constriction both are nouns.

Word	Noun	Adjective	Verb	Adverb
coarctation	Yes	No	No	No
constriction	Yes	No	No	No

As nouns, coarctation and constriction are synonyms defined as:

coarctation (noun)	constriction (noun)
(biology) a narrowing or constriction of a vessel or canal; especially a congenital narrowing of the aorta	the action or process of compressing
tight or narrow compression	a tight feeling in some part of the body
	tight or narrow compression
	a narrowing that reduces the flow through a channel