On the condition; if:
Because event X may occur
Used to introduce an indirect interrogative question that consists of multiple alternative possibilities (usually with correlative or).
On whatever occasion
On the assumption that; supposing:
Find another word for if. In this page you can discover 31 synonyms, antonyms, idiomatic expressions, and related words for if, like: provided that, granting, provided, suppositive, on the assumption that, assuming that, in-case, whether, whenever, supposing that and on condition that.