N::Inflect <https://metacpan.org/pod/Lingua::EN::Inflect>`_.

methods:
    classical inflect
    plural plural_noun plural_verb plural_adj singular_noun no num a an
    compare compare_nouns compare_verbs compare_adjs
    present_participle
    ordinal
    number_to_words
    join
    defnoun defverb defadj defa defan

INFLECTIONS:
    classical inflect
    plural plural_noun plural_verb plural_adj singular_noun compare
    no num a an present_participle

PLURALS:
    classical inflect
    plural plural_noun plural_verb plural_adj singular_noun no num
    compare compare_nouns compare_verbs compare_adjs

COMPARISONS:
    classical
    compare compare_nouns compare_verbs compare_adjs

ARTICLES:
    classical inflect num a an

NUMERICAL:
    ordinal number_to_words

USER_DEFINED:
    defnoun defverb defadj defa defan

Exceptions:
 UnknownClassicalModeError
 BadNumValueError
 BadChunkingOptionError
 NumOutOfRangeError
 BadUserDefinedPatternError
 BadRcFileError
 BadGenderError

é