The nouns 'washer' and 'dryer' are singularnouns. The plural forms are 'washers' and 'dryers'. Examples:
We bought a new washer and dryer.
The laundry room in our building has three washers and dryers.
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 noun 'days' is the plural form of the singular noun 'day'.
The word unit's is the possessive form for the singular noun unit. For example:This unit has its own washer and dryer. The unit's electric bill is the responsibility of the tenant.The plural form is units; the plural possessive form is units'. For example:These units do not have washers and dryers. These units' electric bills are included in the rent.
The noun 'mice' is the plural form of the singular noun 'mouse'.
The singular noun is "louse" and the plural noun is "lice."
noun that are plural in form but singular in meaning
The noun children is the plural form of the singular noun child.
The noun 'circus' is a singular noun.The plural noun is 'circuses'.
The noun juggler is a singular noun. The plural noun is jugglers.
The singular noun is trio; the plural noun is trios.
The singular noun is Tuesday.The plural noun is Tuesdays.
The noun 'orchid' is a singular noun, a word for one.The plural noun is 'orchids'.
The noun mailbox is the singular form; the plural is mailboxes.
Statistics is plural, the singular form is statistic.