Your tongue should not have this issue after a week. Go back to the dentist to have it checked out.
There is no such thing as a route canal. However, there's a root canal which is a dental procedure in which the infected part of a tooth is replaced with an inert material.
Panama Canal
the number of ships that use the cape sea route has dereased because of the suez canal.
Via the Panama Canal would shave some time off of the normal route, around the Horn.
A seaway.
The Erie Canal is in the state of New York. It opened a wider route into the Midwest.
The Panama Canal
South Canal!
The Grand Canal was used as a trade route between northern and southern China
sublingual
A river, canal, or other route for travel by water.
The geographical position of the Suez Canal makes it the shortest route between East and West as compared with the Cape of Good Hope. The Canal route achieves saving in distance between the ports north and south of the Canal.