Greek
abecedarian
accept
accomplished
activate
actuate
admit
affiliate
alphabetarian
apprentice
articled clerk
associate
at concert pitch
begin
beginner
begun
belonger
boot
break ground
break the ice
bring up
broach
brother
card-carrier
card-carrying member
cardholder
career
catechumen
charter member
christen
clubber
clubman
clubwoman
coach
coached
commence
commenced
committeeman
comrade
conventioneer
conventioner
conventionist
conversant
create
debutant
drill
dues-paying member
enlist
include
let in
originate
people
start
initiated
initiates
initiating
initial
initialism
initialize
initials
initiation
initiative
countercurrent
government-in-exile
laypeople
occultist
peritoneal
proselyte
redshirt
sub-chiefs
torture
tyro
officiate