The noun 'police' is a plural, uncountable noun; a form of uncountable (mass) noun called an aggregate noun, a word representing an indefinite number of elements or parts; aggregate nouns have no singular form.
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 noun 'loss' is the singular noun. The plural noun is losses.
The noun juggler is a singular noun. The plural noun is jugglers.
Yes, like people it is a group noun that always uses the plural. To express the singular, you would have to use another noun, such as policeman, policewoman, or police officer.
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.