Get it entirely right: All together vs. altogether

I often see these two words similar sounding words confused in manuscripts I edit for writers.

“Altogether” means “completely” or “entirely” as in “When it came to knowing when to use who and whom, the writer was altogether confused.”

“All together” means “in a group” as in “The chimpanzees sat all together in the exhibit’s corner.”

Here’s an easy way to not look like a monkey when using the two words: “Altogether” is one complete word while “all together” is a group of words.