constriction, bottleneck, chokepoint -- (a narrowing that reduces the flow through a channel)
constriction, coarctation -- (tight or narrow compression)
constriction, tightness -- (a 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")
constriction -- (the action or process of compressing)