Synonyms of fanatical

1 Syllable

mad, nar, wild

2 Syllables

willful, stubborn, avid, headstrong, burning, raving, zealous, rampant, bugged, biased, violent, partial, fiery, frenzied, wild-eyed, rabid, short-fuse, mad-dog, ultraist, smoking, banzai, fervent

3 Syllables

bigoted, heathenish, extreme, erratic, factional, proactive, wrong-headed, feverish, partisan, hidebound, credulous, furibund, sectarian, overboard, racialist, dogmatic, devoted, possessed, worked-up, unruly, frenetic, obsessed, intense, radical

4 Syllables

unindulgent, domineering, visionary, enthusiastic, impulsive, narrowminded, impassioned, doctrinaire, prejudiced, infatuated, emotional, intolerant, obsessive, passionate, narrow-minded, single-minded, obstinate, xenophobic, contumacious, chauvinistic, corybantic, all-consuming

5 Syllables

immoderate, monomaniacal, opinionated, incorrigible