What's the plural form of oat grass? Here's the word you're looking for.
Answer
The noun oat grass can be countable or uncountable.
In more general, commonly used, contexts, the plural form will also be oat grass.
However, in more specific contexts, the plural form can also be oat grasses e.g. in reference to various types of oat grasses
or a collection of oat grasses.
