gain upon (?.)

• accost
• advance
• approach
• appropinquate
• approximate
• bear down on
• bear down upon
• bear up
• catch up with
• close
• close in
• close with
• come
• come closer
• come forward
• come near
• come on
• come up
• come up to
• come up with
• confront
• draw near
• draw nigh
• encounter
• gain on
• lap
• leave behind
• leave standing
• narrow the gap
• near
• outpace
• outrun
• outsail
• outstrip
• overhaul
• overtake
• pass
• proximate
• sidle up to
• step up