Plurals of words -ness

[jaumeortola]

The dictionary contains ~3500 words like this:

acuteness=acuteness/NN:U,acutenesses/NNS=all

I guess the plural form -nessess is very infrequent. Is it okay to have the plurals in the dictionary? For all -ness words?
Is this the desired tagging?

[AzadehSafakish]

I guess the plural form -nessess is very infrequent. Is it okay to have the plurals in the dictionary? For all -ness words?

If they're tagged with NN:U, I would say no.
But, there might be some that actually are countable (like 'harness/harnesses'). I wouldn't remove the plural forms of countable nouns.

Do you have a list I can quickly review?

[jaumeortola]

There are the lists. One from "clean" (tagged and in all spelling dicts) and one from "pending".
ness-pending.txt
ness-clean.txt

[jaumeortola]

Looking into a dictionary of frequencies, these are the only plurals in the first 400,000 word forms:

businesses
witnesses
illnesses
weaknesses
eyewitnesses
harnesses
likenesses
thicknesses
sicknesses
agribusinesses
lionesses
governesses
canonesses
kindnesses
wildernesses
highnesses
deaconesses
consciousnesses
jeunesses (French?)
eye-witnesses
finesses
sadnesses

[AzadehSafakish]

Looking into a dictionary of frequencies, these are the only plurals in the first 400,000 word forms:

Makes sense. Almost all of them are countable too.
I took a quick look at the previous lists, and I think most of those words can be discarded.
Keeping only the words posted above is probably a safe bet, but it would be good to ensure that any derivatives of those words are included as well: businesses/agribusinesses/ecobusinesses, consciousnesses/pseudo-consciousnesses, etc. (those might not be real words, just made up for sake of example).