Varying your words

Let's don't vary words for the sake of variation, okay people?

I am reading memos about a seller disclaiming the implied warranty of merchantability. Some writers use a different word once they've used disclaim.

I get waive the implied warranty

• not right for what the seller does

I get avoid the implied warranty

• close, but not the same as disclaim

I get repudiate the implied warranty

• fine, I guess
  

But why can't we just use disclaim? These writers do not realize the word is sort of stock term here. Or they don't realize that the word's appearing in the statute means it's an important word. And they're still varying words for the sake of variation.

Let's don't.