A synonym for “we'll” could be “we will”.
“We'll” is a contraction of “we will”. It is a commonly used abbreviation in spoken and written English. For example, “We'll go to the park later.” This is a more casual way of expressing the intention to do something.
“We will” is a more formal or emphatic way of stating the same thing. For instance, “We will achieve our goals.” It gives a sense of determination and purpose.
Both expressions are used to talk about future actions or intentions. They can be used interchangeably in many contexts, although “we'll” is often preferred in more informal settings.
In conclusion, “we will” is a synonym for “we'll” and can be used depending on the formality and tone of the communication.