- enthusiast, partisan, partizan - an ardent and enthusiastic supporter of some person or activity
--1 is a kind of supporter, protagonist, champion, admirer, booster, friend
--1 has particulars:addict, nut, freak, junkie, junky; backslapper; balletomane; fanatic, fiend; gadgeteer; shutterbug; sports fan, fan - fancier, enthusiast - a person having a strong liking for something
--2 is a kind of admirer, adorer
--2 has particulars: animal fancier; bird fancier; technophile