6
votes
1answer
17k views

What is the proper plural of “a series”? [closed]

In math, we use the term series a lot, and there are many types of series. How should I craft my sentence when I have three different ones in mind to talk about? Should I settle down for a less ...
23
votes
2answers
3k views

Why is 'sheep' the same when talking about one or more than one?

I am trying to find out why sheep has the plural sheep. I have found different explanations, such as, "it is because they were seen as uncountable, as in 'a herd of sheep'", "because it comes from ...
6
votes
5answers
11k views

Why does the incorrect plural “aircrafts” seem to be occurring more often?

My first reaction to aircrafts was to think it was a typo, but I just checked usage on NGrams... ...and compared it to usage for the singular / collective noun form aircraft... ...which seems to ...
14
votes
3answers
12k views

Is there a term for words that have identical singular and plural forms?

Is there a term for nouns that have identical singular and plural forms? For example, sheep fish glasses aircraft/spacecraft etc.
3
votes
2answers
778 views

Irregular plurality situations in English

Why do some nouns in English not take the plurality suffix in the plural form? Could you give me a list of plural nouns which don't take "-(e)s" suffix? For example, I know about "fish" and "sheep".