Answer:

SCOPE

AnswerCrossword Clue
SCOPERange
SCOPEBig name in mouthwash
SCOPEExtent of operation
SCOPERifle attachment
SCOPEOral-B alternative
SCOPEExtent
SCOPEExamine, slangily, with "out"
SCOPEAiming aid
SCOPEMouthwash brand
SCOPEEnding for micro- or oscillo-
SCOPEReach
SCOPESniper's aid
SCOPECheck (out)
SCOPERifleman's aid
SCOPESharpshooter's apparatus
SCOPEListerine alternative
SCOPERange or extent
SCOPERange of view
SCOPEEffective range
SCOPESniper's accessory
SCOPEAmbit
SCOPEListerine competitor
SCOPEListerine rival
SCOPESharpshooter's aid
SCOPEArea
SCOPECheck out
SCOPEExtent of activity
SCOPESub's eye
SCOPEAccessory for a marksman
SCOPEBreadth
SCOPESharpshooter's tool
SCOPESub viewer
SCOPEExamine, with "out"
SCOPEConfines
SCOPELatitude
SCOPEField of vision
SCOPEMagnitude
SCOPESharpshooter's magnifier
SCOPESub "window"
SCOPEPurview