Is it axises or axis?

The plural of axis is axes, not “axises.”

The word axes is considered an irregular plural noun and is derived from Latin origins. This means it follows the Latin rules of pluralization, not the regular pluralization rules of adding “-s” or “-es.”

Latin-derived words that end in “-is” are made plural by changing the “-is” to “-es.”

Scribbr’s free Grammar Checker can help you make sure you’re using the correct plural forms of words.