What is the simile as heavy as?

"As heavy as..." is not a simile on its own. It's the beginning of a simile.

A simile is a figure of speech that compares two unlike things using the words "like" or "as."

To make a complete simile, you need to add the second part of the comparison after "as heavy as." For example:

* As heavy as a rock

* As heavy as a lead weight

* As heavy as a thousand pounds

Let me know if you have a specific comparison in mind, and I can help you complete the simile!