With my collie, Starbuck, I used "Front" for his recalls in obedience. I also trained him to hand signals too. I don't think it really matters what the word is as long as the dog responds. "Front" made sense since it isn't a word that is normally used in everyday conversations. Starbuck would also respond to "come" but he knew that if I said 'Starbuck, Front' I meant business. it worked since he did get his CD and his RN titles. He was one leg away from his RA title but due to health issues (myasthenia gravis) I had to retire him. He just couldn't make the jumps.