Do nonsense and bull**** have corresponding plural forms?

For example, I've heard nonsenses, but I've never heard bullshits.

Why one is plural and the other is singular? They mean the same thing.

From the perspective of a plural of bullshit

It is so because bullshit is considered to be uncountable. [reference link]

But also consider this that there exists a word bullshits:

Bullshits >> Third-person singular simple present indicative form of bullshit. [reference link]

As far as nonsense is considered, it is usually uncountable [reference link] and the plural for it is nonsenses[reference link].

Read this article in order to have a grasp of nouns which can be either countable or uncountable.