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