nimbuses
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 correct plural form of "foot" 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."
echoes
The plural possessive form is passengers'.
No, boss's is a singular possessive noun. Bosses is the correct plural form.
The correct form is "databases." This is the plural form of the word "database" and does not require an apostrophe.
Singular: guardPlural: guards