As nouns the difference between bach and rach

is that bach is a holiday home, usually small and near the beach, often with only one or two rooms and of simple construction while rach is a dog that hunts by scent.

As proper nouns the difference between bach and rach

is that bach is {{surname|from=German}} of English-speakers while Rach is a female given name, diminutive of Rachel.

As a verb bach

is to live apart from women, as with the period when a divorce is in progress (compare bachelor pad).