freak

abortion, malformation, miscreation, mutant, mutation

character, crackbrain, crackpot, crank, eccentric, kook, nut, oddball, screwball, weirdo

aberrant, deviant

individualist, maverick, nonconformist

curiosity, peculiarity, singularity

aberration, exception, irregularity, oddity, rarity

groupie

admirer, amateur, collector, connoisseur, dilettante

authority, expert

adherent, convert, cultist, disciple, follower, hanger-on, votary

advocate, apostle, backer, champion, evangelist, exponent, friend, patron, promoter, proponent, supporter

partisan (also partizan), zealot

booster, rooter, well-wisher

faddist

capriciousness, fancifulness, fantasy (also phantasy), freakishness, impetuosity, whimsicality

conceit

concept, conception, image, impression, mind's eye, picture, thought

brainstorm, inspiration