The Oxford Thesaurus An A-Z Dictionary of Synonyms - intense adj.

1) extreme, excessive, severe, strong, great, fierce, harsh, acute, powerful, profound, deep: The intense heat kept the firemen at bay. 2) eager, enthusiastic, keen, earnest, sincere, heartfelt, deep, passionate, impassioned, ardent, zealous, animated, burning, consuming, fervent, fervid, perfervid, vehement, frantic, fanatical, frenzied: I had an intense desire to see the culprit brought to justice. 3) highly-strung or chiefly US high-strung, emotional, temperamental, tense, touchy, testy, volatile, hysterical, hotheaded, feverish, nervous, (high-) spirited, impetuous, impulsive, Colloq uptight: I appreciate his enthusiasm, but I wish Henshawe were a bit less intense about his politics.