Declension table of ?kūpāṅka

Masculine	Singular	Dual	Plural
Nominative	kūpāṅkaḥ	kūpāṅkau	kūpāṅkāḥ
Vocative	kūpāṅka	kūpāṅkau	kūpāṅkāḥ
Accusative	kūpāṅkam	kūpāṅkau	kūpāṅkān
Instrumental	kūpāṅkena	kūpāṅkābhyām	kūpāṅkaiḥ kūpāṅkebhiḥ
Dative	kūpāṅkāya	kūpāṅkābhyām	kūpāṅkebhyaḥ
Ablative	kūpāṅkāt	kūpāṅkābhyām	kūpāṅkebhyaḥ
Genitive	kūpāṅkasya	kūpāṅkayoḥ	kūpāṅkānām
Locative	kūpāṅke	kūpāṅkayoḥ	kūpāṅkeṣu

Compound kūpāṅka -

Adverb -kūpāṅkam -kūpāṅkāt