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