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