The plural of 'foot' is 'feet'.
The correct plural form of "foot" is "feet."
The plural form of the noun river is rivers.
The correct plural form of "wolf" is "wolves." "Wolfs" is not the correct plural form.
The noun foot is singular. The plural is feet.
"Classes" is the correct plural form of the word "class."
The word "women" in its plural form does not have an apostrophe before or after. The correct plural form is "women."
The plural form of the noun river is rivers.
The plural of foot is feet. The possessive form of feet would have to be feet's. However, I cannot think of any sentence where I would use that word in that form. (My feet's toes are getting cold.) I just don't like that word. I would rearrange the sentence. (The toes on my feet are getting cold.) Both are correct.
The correct plural form of "wolf" is "wolves." "Wolfs" is not the correct plural form.
The noun foot is singular. The plural is feet.
The answer to What is the plural form of the word gar is either gar or gars. (Both are correct.)
Actually, the plural form radiuses is accepted as correct and has found it's way into dictionaries (see the link below). The word radius and the plural radii are derived from the Latin word radius, a word for the spoke of a wheel. The plural form is a standard form for a plural in Latin.
"Classes" is the correct plural form of the word "class."
The word "women" in its plural form does not have an apostrophe before or after. The correct plural form is "women."
nimbuses
echoes
The plural possessive form is passengers'.
The correct form is "databases." This is the plural form of the word "database" and does not require an apostrophe.