Crossword clues for Sub 4 letters:SUBSCertain vessels.SUBSVarsity replacements.SUBSUnderwater vessels, for shortSUBSUndersea travelersSUBSU-boats.SUBSNaval units: Colloq.SUBSPlayers often put in for garbage timeSUBSQuiznos offeringsSUBSReplacements, for shortSUBSTeachers' fill-ins, brieflySUBSSandwiches or standbysSUBSFish, in the Navy.SUBSFill-in teachers.SUBSTakes the place of: Colloq.SUBSSome six-footersSUBSTorpedo shootersSUBSComes off the benchSUBSBackupsSUBSFills inSUBSSome sandwichesSUBSUndersea vesselsSUBSSits in (for)SUBSSandwiches or stand-insSUBSUndersea vessels, for shortSUBSStand-ins, for shortSUBSSecond-stringersSUBSHeroesSUBSSecond-string players.SUBSPart of the Navy.SUBSNonpermanent teachers, for short.SUBSClassroom stand-insSUBSPinch hittersSUBSTempsSUBS10-Down offeringsSUBSStand-insSUBSBattleship piecesSUBSHerosSUBSLong lunches?SUBSBenchwarmersSUBSNonstarters?SUBSSix-footers at partiesSUBSReplacementsSUBSOffice tempsSUBSFill-insSUBSTerrible places for claustrophobesSUBSCylindrical lunchesSUBSThose on the benchSUBSSome foot-longsSUBSReserves on the benchSUBSThe bench.