this are irregular nouns
Those words are called irregular nouns.
Some nouns that have the same form for singular and plural are:one deer, two deeraircraftsalmontroutsheepswineoffspringpoliceAnother group of nouns are the binary nouns, words that are a shortened form for 'a pair of', for example:one pair of glasses, two pairs of glassesbinocularspantsjeansshortsscissorstweezerstongs
'Hypotheses' is plural; the singular would be 'hypothesis'.
No. The term analysis (examination, study) is singular. The plural is analyses.(* In British English, the third person singular present tense is also spelled analyses, whereas in US English, the verb is analyzes.)
The term "gulf" is singular. It refers to a large area of sea or ocean that is partly enclosed by land. If referring to multiple gulfs, it is correct to use the plural form "gulfs."
The word uncle is a singular noun. The plural term is uncles.
Some nouns that have the same form for singular and plural are:one deer, two deeraircraftsalmontroutsheepswineoffspringpoliceAnother group of nouns are the binary nouns, words that are a shortened form for 'a pair of', for example:one pair of glasses, two pairs of glassesbinocularspantsjeansshortsscissorstweezerstongs
plural-singular nouns
The medical term "dysphagia" (trouble swallowing) is a noun, but it is not singular or plural.
Criterion is the singular. The plural is criteria.
'Hypotheses' is plural; the singular would be 'hypothesis'.
Yes there is. Believe it or not, the plural of moose is simply moose.Moose is one of the words in English that the singular and the plural are the same word.Example sentences:A moose was standing near the edge of the trees. (singular)Two moose were standing near the edge of the trees. (plural)Contrary to popular belief, Meese, Moosen, and Mooses simply aren't words.
Mitochondria is already plural. The singular form is Mitochondrion.Mitochondria IS plural. The single form is mitochondrion.
Organisms is the plural of organism
phalanges
The noun simplicity is the singular form; the plural form is simplicities.
The word "trachea", the term used for the wind-pipe, is in the singular. The plural is "tracheas" or, infrequently, "tracheae", both of which are recognized by the dictionary.
Economics is a collective term. It is used in the singular.