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