addict
bug
collector
demon
eager beaver
energumen
enthusiast
faddist
fanatic
fiend
freak
great one for
hound
infatuate
nut
pursuer
rhapsodist
sucker for
visionary
zealot
amateur
hobbyism
all
aquatica
bimonthly
carpool
chartist
chartists
concessionaires
dietician
entomological
forma
fumfum
gunbattle
half-hourly
hobbyists
militaryshow
nine-o'clock
online/offline
squadroom
stuph
theoretician
thetsukiji
vpro