Nouns

(n)stringency, tightnessa state occasioned by scarcity of money and a shortage of credit
(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)concentration, density, denseness, tightness, compactnessthe spatial property of being crowded together
(n)tightness, tautnesslack of movement or room for movement