Maximize
Part of speech: verb
Definition: to make as large as possible
Example sentence: Here's what I tell anybody and this is what I believe. The greatest gift we have is the gift of life. We understand that. That comes from our Creator. We're given a body. Now you may not like it, but you can maximize that body the best it can be maximized.
Maximise
Part of speech: verb
Definition: To make as large as possible