... is lawnmower grammatically correct or should it always be lawn mower?
Hello
Mower freak.

From my understanding both are correct.
It's part of the history of the malleability of the English language.
Here's a clear explanation: - https://www.sarahtownsendeditorial....-one-compound-words-and-how-to-use-them/I'm happy to use
lawnmower and
grasscatcher and the like.
For me, they are closed compound words.
Or, is that closed-compound words?

Cheers
Jack