List of English Nouns and their Plural Form

Question

Is there a list of nouns and their plurals?

E.g. apple apples, genius geni, roof rooves, etc.

I have the GCIDE dictionary but that only contains singular nouns.

Answer 1

This python package can pluralize words for you, you can just run your entire dictionary through it to get the plural forms: http://www.clips.ua.ac.be/pages/pattern-en#pluralization

For this you first need Python, I myself use winpython, but any python installation would do. You can then download the pattern package here: http://www.clips.ua.ac.be/pattern

Answer 2

You can extract the English nouns with their plural forms from the Wiktionary.