"It'll" is a contraction of "it will", which implies a future event or action. There are various synonyms for "it'll" that can be used interchangeably, depending on the context of the sentence. These include "it shall", "it's going to", "it's bound to", "it's certain to", "it's sure to", "it's likely to" and "it's slated to". These synonyms convey the same meaning as "it'll" and can replace it in sentences without changing their significance. The use of different synonyms adds variety to writing and helps the reader understand the intended message more clearly.
