Rava refers to semolina in Hindi and other Indian languages. Semolina is a coarse, durum wheat flour that is used in many Indian dishes, like upma and halwa.
Couscous is a type of pasta made from semolina, but it is a distinct product with its own unique texture and cooking method. It is typically used in North African and Mediterranean cuisines.
While both couscous and rava are made from semolina, they are not interchangeable.