constriction vs bottleneck

constriction and bottleneck both are nouns.

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

As nouns, constriction and bottleneck are synonyms defined as:

constriction and bottleneck: a narrowing that reduces the flow through a channel

Other synonyms of constriction include chokepoint.

constriction (noun)	bottleneck (noun)
the action or process of compressing	the narrow part of a bottle near the top
a tight feeling in some part of the body	a narrowing that reduces the flow through a channel
tight or narrow compression
a narrowing that reduces the flow through a channel

constriction (verb)	bottleneck (verb)
	become narrow, like a bottleneck
	slow down or impede by creating an obstruction