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

By gender

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

By number

	Regular nouns
	Singular			Dual			Plural
	Masc.	Fem.	Neut.	Masc.	Fem.	Neut.	Masc.	Fem.	Neut.
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 m (pólemos, “war”)			μῆλον n (mêlon, “apple”)
	Singular	Dual	Plural	Singular	Dual	Plural
Nominative	πόλεμος	πολέμω	πόλεμοι	μῆλον	μήλω	μῆλᾰ
Vocative	πόλεμε
Accusative	πόλεμον		πολέμους
Genitive	πολέμου	πολέμοιν	πολέμων	μήλου	μήλοιν	μήλων
Dative	πολέμῳ		πολέμοις	μήλῳ		μήλοις