What is another word for tops out?
Pronunciation: [tˈɒps ˈa͡ʊt] (IPA) 
When it comes to finding synonyms for the phrase "tops out," there are a number of words and phrases that might come to mind. Some possibilities could include "hits its peak," "reaches the summit," "maxes out," "reaches the pinnacle," "attains its highest point," or "reaches its apex." Depending on the context in which the term is being used, other options could include "achieves its crowning moment," "hits its high point," "reaches the top," or "reaches its zenith." Ultimately, the specific synonym that is most appropriate will depend on the tone and purpose of the writing or conversation.
