Proofs
The plural form is challenges.
there isnt a plural form of a.
Arguments is in the plural form for the singular noun argument.
"Daffodils" is the plural of "daffodil."
The plural form is digits; the singular form is digit.
The noun 'proof' is an uncountable noun except as a word for a printing proof or a photographic proof.The plural form of the noun 'proof' is proofs.The plural possessive form is proofs'.Example: the proofs' printout is eight pages.
The plural of proof may remain as proof or be proofs.Proof: There were many items of proof that pointed to his innocence in the crime.Proofs: The photographic proofs will be ready in two hours.
Bridges is the plural form of bridge.
"Beliefs" does not have a plural form, as it is already plural. Beliefs is the plural form of belief.
There is no plural form for the word, countries. This word itself is a plural.
"Groceries" is the plural form of "grocery."
The plural form of "meter" is "meters."
It has no plural form.
The plural form for the noun sergeant is sergeants; the plural possessive form is sergeants'.
Evidence does not have a plural form, as it is an uncountable noun. It is like information, or furniture, or even news, which, in spite of the final -s is always singular. So, you can have "a piece of evidence", or "pieces of evidence", but not "evidences".
The plural form of rung is rungs.
The plural form of mouth is mouths. The plural form of month is months. The Mounth is a range of hills in Scotland and does not have a plural form.