Maecenas
abettor
admirer
advocate
aficionado
allegorist
alter ego
alternate
amicus curiae
angel
annotator
apologist
attorney
backer
backup
backup man
booster
buff
case
case in point
champion
cicerone
clarifier
commentator
critic
cross section
cryptanalyst
cryptographer
cryptologist
decoder
defender
definer
demonstration
demonstrator
demythologizer
dependence
deputy
diaskeuast
dragoman
dummy
editor
emblem
embodiment
emendator
emender
encourager
endorser
euhemerist
example
executive officer
intellect
intellectual
adherent
biographer
disciple
educator
exposition
interpreter
novelist
orator
philanthropist
practitioner
proponent
reformer
representative
supporter
theologian
thinker