Transept, nave, aisle, chancel
If the chancel, strictly defined as 
choir... [DOC] [TLE] nave | church architecture | Britannica.com [PAR] Oct 19, 2016 ... Nave, central and principal part of a Christian church, extending from the entrance (the narthex) to the transepts (transverse aisle crossing the nave in front of the sanctuary in a cruciform church) or, in the absence of transepts, to the chancel (area around the altar).