Category:English nouns with unknown or uncertain plurals

This category contains entries that use {{en-noun|?}}, which indicates that the plural of the given entry is yet not known. As much as is possible, a plural should be added or, if the noun is uncountable {{en-noun|?}} should be converted to {{en-noun|-}}. If a plural cannot be attested but the noun is theoretically countable, use {{en-noun|!}}.