In the sense of "toast," health could be pluralized, as in "We drank so many healths we got sick." Otherwise, it has no plural.
Bills of health is the plural
The plural of board is boards.
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.
Health is an uncountable noun and has no plural.
The plural form for the noun chicken is chickens; the plural possessive form is chickens'.
Bills of health is the plural
The plural of board is boards.
Bridges is the plural form of bridge.
"Groceries" is the plural form of "grocery."
There is no plural form for the word, countries. This word itself is a plural.
"Beliefs" does not have a plural form, as it is already plural. Beliefs is the plural form of belief.
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'.
The plural form of rung is rungs.