The word 'both' is not a noun, the word 'both' is an indefinite pronoun, an adjective, or a conjunction. Examples:
indefinite pronoun: Both are good but the raspberry is my favorite.
adjective: Both puppies have new homes.
conjunction: We visited both the Metropolitan Museum and the Guggenheim.
noun that are plural in form but singular in meaning
The noun 'syllabus' is the singular form. The plural forms are syllabi or syllabuses, both are accepted.
Yes, the noun sheep is both singular and plural.
The noun cousin is the singular form. The plural noun is cousins.
The word century's is the possessive form of the singular noun century.The plural noun is centuries.The plural possessive form is centuries'.Example: Several centuries' records were destroyed in the war.
The singular form of the noun is stapler. The singular posessive form of the noun would be stapler's. The plural form of the noun would be staplers. The plural posessive form of the noun would be staplers'
The singular possessive form of "faculty" is "faculty's."
The noun form Williams' is a plural possessivenoun.The singular possessive noun is William's.Examples:Both of the Willams' last names are similar, William Jackson and William Johnson. (plural)My brother William's birthday is on Saturday. (singular)
singular
Painters'
Music is a singular, uncountable noun.
It is both a singular or plural noun.
The knife's edge had been dulled when it hit the rock. Knife's is singular posessive. The knives' edges had been dulled when they hit the rock. Knives' is plural posessive.
The plural form of the singular noun 'company' is companies.The plural possessive form is companies'.Example: The companies' names on the directory are in alphabetic order.
The word husband's is the possessive form of the singular noun husband.The plural noun is husbands.The plural possessive form is husbands'.Example: We must applaud our husbands' efforts to plan the party.
noun that are plural in form but singular in meaning
The noun 'syllabus' is the singular form. The plural forms are syllabi or syllabuses, both are accepted.