Declension table of kūpaka

Masculine	Singular	Dual	Plural
Nominative	kūpakaḥ	kūpakau	kūpakāḥ
Vocative	kūpaka	kūpakau	kūpakāḥ
Accusative	kūpakam	kūpakau	kūpakān
Instrumental	kūpakena	kūpakābhyām	kūpakaiḥ
Dative	kūpakāya	kūpakābhyām	kūpakebhyaḥ
Ablative	kūpakāt	kūpakābhyām	kūpakebhyaḥ
Genitive	kūpakasya	kūpakayoḥ	kūpakānām
Locative	kūpake	kūpakayoḥ	kūpakeṣu

Compound kūpaka -

Adverb -kūpakam -kūpakāt