i don't think so that there are such kinds of words.
Examples of nouns that are the same in the singular and the plural:sheepdeergrouseChineseSwissLebaneseoffspringknowledgebarracksinformationbutterswine
Words that are the same in the singular and plural:scissorsinformationsheepmusicnewstrousersheadquartersgolddeeroffspring
Some nouns that do not have a singular form are:Aggregate nouns, words representing an indefinite number of parts. Examples:accommodationsbarracksclothescommunicationsgoodsspeciesNouns that are a short form for a 'a pair of'. Examples:glassesscissorstweezerspajamaspantsshorts
Some irregular plural nouns have the same spelling as their singular form such as scissors, pants, bison, deer, and sheep.
Some nouns that are the same for the singular and the plural are:deerfishelksheepoffspringSome nouns are singular but appear to be plural; words that are a short form for 'a pair of...'. There is no plural for these nouns, the plurals are expressed by using 'pairs of...'. Some examples are:pantsshortsglassesscissorsbinocularsUncountable nouns have no plural form and take a verb for the singular. Some uncountable nouns are:moneyinformationnewsadviceelectricity
Examples of nouns that are the same in the singular and the plural:sheepdeergrouseChineseSwissLebaneseoffspringknowledgebarracksinformationbutterswine
Words that are the same in the singular and plural:scissorsinformationsheepmusicnewstrousersheadquartersgolddeeroffspring
The singular form of "aspirin" is "aspirin." It's one of those words where the singular and plural are the same!
Nouns that are always plural with no singular form are:newsmathematicsclothes
Some nouns that do not have a singular form are:Aggregate nouns, words representing an indefinite number of parts. Examples:accommodationsbarracksclothescommunicationsgoodsspeciesNouns that are a short form for a 'a pair of'. Examples:glassesscissorstweezerspajamaspantsshorts
Examples of nouns that do not change form for singular to plural:advicedeerbinocularsmeansoffspringpantssalmonscissorssheepspeciesswinetrout
Some irregular plural nouns have the same spelling as their singular form such as scissors, pants, bison, deer, and sheep.
The singular of virus is "virus." Unlike most words, virus does not change form when it is singular or plural.
Some nouns that are the same for the singular and the plural are:deerfishelksheepoffspringSome nouns are singular but appear to be plural; words that are a short form for 'a pair of...'. There is no plural for these nouns, the plurals are expressed by using 'pairs of...'. Some examples are:pantsshortsglassesscissorsbinocularsUncountable nouns have no plural form and take a verb for the singular. Some uncountable nouns are:moneyinformationnewsadviceelectricity
wife wives safe safes knife knives
he / she / Chinese / sheep / deer / fish / Swiss / species / crossroads / barracks / headquarters / offspring / data / dice / aircraft
The singular possessive form is a friend's photo.