Directions: Scan the following passage and find the words which have roughly the same meanings as those given below.

     If spaceships were launched from space or from the moon, the absence of weight would permit the ships to be launched with great speed at reduced pressures. A relatively small explosion would be enough to send a ship off at a very fast rate. And, since there is no atmosphere in space as there is on earth, the spaceship would meet with no resistance. To illustrate this point, remember how strong the wind feels if we are traveling fast in a car; then imagine a car traveling through an area where there is no wind. The windless condition is comparable to the condition in outer space.