Answer:
The first and most notable difference is the court, the size, coloration and layout are completely different, for instance, the squash court has walls to bounce the ball off of whereas the tennis court is more similar to the volleyball court with a net and players on both sides of it. Another difference would be the size of the rackets, a tennis racket is known to be bigger than a squash racket. The last difference would be that there are usually only two people in a squash game to bounce the ball back to one another whereas in tennis you are playing with other opponents. Hope this helps :)
Explanation: