Standard Hindi distinguishes two genders (masculine and feminine), two noun types (count and non-count), two numbers (singular and plural), and three cases (direct, oblique, and vocative).
There is a peculiar long form in Bihari Hindi, for most tadbhava and marked nouns, a feature also prevalent in Maithili, Magahi and Bhojpuri.
-iyā aiyā -iyan/aiyan -iyā sab (yā if i/ī-ending, iyā if ∅/a/ā-ending) -iyan Plural is not mandatory, it can be dropped when inanimate or indefinite.
Notes for noun declension: Adjectives may be divided into declinable, and indeclinable categories.
Instead of number, adjectives are qualified for honour, a characteristic feature of Bihari languages.
The set of declinable adjective terminations is similar but greatly simplified in comparison to that of noun terminations — Indeclinable adjectives are completely invariable, and can end in either consonants or vowels (including ā and ī ).