The windows.
The plural form for path is paths.
The plural form of ceiling is ceilings.
The possessive form for the singular noun roof is roof's.The plural form for the noun roof is rooves.The plural possessive form is rooves'.
Similar is an adjective. The corresponding noun is similarity, the plural form of which is similarities.
The plural possessive form of sparrows is sparrows'
Bridges is the plural form of bridge.
The windows.
"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'.
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.
It's about as plural as can be, except there is only one building and only one window ledge.