Appendix:Ancient Greek second declension

Greek nouns of the second declension are masculines and feminines in -ος (-os), and neuters in -ον (-on). For those in -ως (-ōs) and -ων (-ōn) (Attic nouns), see Appendix:Ancient Greek Attic declension.

Suffixes

	Regular nouns
	Masculine & Feminine			Neuter
	Singular	Dual	Plural	Singular	Dual	Plural
Nominative	–ος	–ω	–οι	–ον	–ω	–ᾰ
Genitive	–ου	–οιν	–ων	–ου	–οιν	–ων
Dative	–ῳ		–οις	–ῳ		–οις
Accusative	–ον	–ω	–ους	–ον	–ω	–ᾰ
Vocative	–ε		–οι

	Regular nouns
	Singular		Dual		Plural
	m./f.	n.	m./f.	n.	m./f.	n.
Nominative	–ος	–ον	–ω		–οι	–ᾰ
Vocative	–ε
Accusative	–ον				–ους
Genitive	–ου		–οιν		–ων
Dative	–ῳ				–οις

Examples

	Regular nouns
	Masculine & Feminine			Neuter
	πόλεμος (polemos, "war") m			μῆλον (mēlon, "apple") n
	Singular	Dual	Plural	Singular	Dual	Plural
Nominative	πόλεμος	πολέμω	πόλεμοι	μῆλον	μήλω	μῆλα
Genitive	πολέμου	πολέμοιν	πολέμων	μήλου	μήλοιν	μήλων
Dative	πολέμῳ		πολέμοις	μήλῳ		μήλοις
Accusative	πόλεμον	πολέμω	πολέμους	μῆλον	μήλω	μῆλα
Vocative	πόλεμε		πόλεμοι