Adjektive
common [ commoner/more common ; commonest/most common] , {math.}
مشترك {رياضيات}
shared {relations}
mutual [ more mutual ; most mutual ]
corporate {account.}
مُشْتَرَك {محاسبة}
communal [ more communal ; most communal]
...
Noun
participant [pl. participants]
partner [pl. partners]
subscriber [pl. subscribers]
entrant [pl. entrants]
participator [pl. participators]