Final answer:
Plural-only nouns are nouns that only occur in plural form such as 'scissors' and 'pants,' and they require plural verbs in sentences.
Step-by-step explanation:
What are plural-only nouns? Plural-only nouns are nouns that exist only in the plural form and do not have a singular counterpart. These are often words that describe items that naturally come in pairs or sets, such as scissors, glasses, pants, and clothes. Similarly, certain conditions or diseases, such as measles and mumps, are always treated as plural. Plural-only nouns require plural verbs for agreement in sentences.
For example: The glasses are on the table. Note that these are distinct from mass nouns, such as furniture and information, which are singular in form and take a singular verb, despite referring to a multitude of items or data.