Noun

A noun is a word that can be used to refer to a person, animal, place, thing, phenomenon, substance, quality, or idea; one of the basic parts of speech in many languages, including English.

In my language, nouns are inanimate or animate.

Inanimate Noun
Inanimate nouns refer to nouns that lack gender. All inanimate nouns end in o, to signify neutrality. Examples of inanimate nouns include:
 * meso "table"
 * creatio "creation"
 * linguo "language"
 * vocabulo "word".

Animate Noun
Animate nouns refer to nouns that have gender. They either end in o (to indicate masculinity) or a (to indicate femininity). Examples of animate nouns include:
 * bovo "male cow" / bova "female cow".
 * ferrario "male blacksmith" / ferraria "female blacksmith."

An irregularity in animate nouns are words that end with tor. Examples include: As you can see, the masculine variant excludes an o at the ending, but the feminine variant still includes an a at the ending.
 * imperator "emperor" / imperatora "empress".
 * moderator "moderator" / moderatora "female moderator".