The noun 'water' is a singular, uncountable noun, a word for a substance. Units of water are expressed in measures or forms such as cups of water, glasses of water, bodies of water, etc.
The plural noun 'waters' is a word specifically for an area of seawater bordering on and under the control of a country (territorial waters); water from a particular source (the waters at Baden-Baden); or used for a particular type of situation (troubled waters).
The word 'water' is also a verb: water, waters, watering, watered.
The noun 'mice' is the plural form of the singular noun 'mouse'.
The noun 'circus' is a singular noun.The plural noun is 'circuses'.
The noun juggler is a singular noun. The plural noun is jugglers.
Statistics is plural, the singular form is statistic.
The word moon is a singular noun. The plural noun is moons.
The noun 'mice' is the plural form of the singular noun 'mouse'.
"Children" is a plural noun. The singular form is "child."
The noun 'circus' is a singular noun.The plural noun is 'circuses'.
The word "loss" is singular. It refers to the act or instance of losing something.
The noun juggler is a singular noun. The plural noun is jugglers.
The singular noun is Tuesday.The plural noun is Tuesdays.
The singular noun is trio; the plural noun is trios.
The noun 'orchid' is a singular noun, a word for one.The plural noun is 'orchids'.
Statistics is plural, the singular form is statistic.
No, Mice is a plural noun. Mouse is the singular noun.
The word aisle is a singular noun. The plural noun is aisles.
The word moon is a singular noun. The plural noun is moons.