Nouns

(n)constriction, bottleneck, chokepointa narrowing that reduces the flow through a channel
(n)constriction, coarctationtight or narrow compression
(n)constriction, tightnessa tight feeling in some part of the body“he felt a constriction in her chest”, “she felt an alarming tightness in her chest”, “emotion caused a constriction of his throat”
(n)constrictionthe action or process of compressing