苦悶[kumon] anguish
煩悶[hanmon] worry
悶える[modaeru] to be in agony
悶死[monshi] die in agony
悶着[monchaku] trouble

憂悶[yuumon] anguish
悶悶[monmon] worrying endlessly
遣悶[kenmon] driving away melancholy
身悶え[mimodae] writhing (in agony)
悶絶[monzetsu] fainting in agony

隔絶[kakuzetsu] isolation
気絶[kizetsu] faint
拒絶[kyozetsu] refusal
拒絶反応[kyozetsuhannou] (organ) rejection
空前絶後[kuuzenzetsugo] (so marvelous or horrible that it may be) the first and probably the last

懸絶[kenzetsu] great difference
根絶[konzetsu] eradication
謝絶[shazetsu] refusal
絶えず[taezu] constantly
絶える[taeru] to die out