Synonyms of tense in English:

tense


See definition of tense

adjective

1‘the tense muscles of his neck’

SYNONYMS
taut, stretched tight, tight, rigid, stretched, strained, stiff
ANTONYMS

slack, loose

2‘by five o'clock, Loretta was feeling tense and irritable’

SYNONYMS
anxious, nervous, on edge, edgy, strained, stressed, under a strain, under pressure, agitated, ill at ease, unrelaxed, in a state of nerves, in a state of agitation, fretful, uneasy, restless, worked up, keyed up, overwrought, highly strung, wrought up, strung out, jumpy, on tenterhooks, on pins and needles, with one's stomach in knots, fidgety, worried, apprehensive, upset, disturbed, panicky
British nervy
informal with butterflies in one's stomach, a bundle of nerves, jittery, twitchy, in a state, uptight, wired, het up, stressed out, white-knuckled
British informal strung up, stressy, windy
North American informal spooky, squirrelly
Australian, New Zealand informal toey
dated overstrung
ANTONYMS

calm, cool, relaxed

3‘it was a tense moment for everyone’

SYNONYMS
nerve-racking, stressful, anxious, worrying, concerning, fraught, charged, strained, nail-biting, worrisome, difficult, uneasy, uncomfortable
exciting, cliffhanging, knife-edge, dramatic, volatile, explosive
informal hairy, anxious-making, white-knuckle
ANTONYMS

relaxing


verb

1‘Hebden tensed his cheek muscles’

SYNONYMS
tighten, tauten, tense up, flex, contract, brace, stiffen
screw up, knot, strain, stretch
North American squinch up
ANTONYMS

relax