(n)stress, emphasis, accentthe relative prominence of a syllable or musical note (especially with regard to stress or pitch)“he put the stress on the wrong syllable”
(n)tension, tenseness, stress(psychology) a state of mental or emotional strain or suspense“he suffered from fatigue and emotional tension”, “stress is a vasoconstrictor”
(n)stress, straindifficulty that causes worry or emotional tension“she endured the stresses and strains of life”, “he presided over the economy during the period of the greatest stress and danger” (R.J.Samuelson)