Declension table of ?reka

Masculine	Singular	Dual	Plural
Nominative	rekaḥ	rekau	rekāḥ
Vocative	reka	rekau	rekāḥ
Accusative	rekam	rekau	rekān
Instrumental	rekeṇa	rekābhyām	rekaiḥ rekebhiḥ
Dative	rekāya	rekābhyām	rekebhyaḥ
Ablative	rekāt	rekābhyām	rekebhyaḥ
Genitive	rekasya	rekayoḥ	rekāṇām
Locative	reke	rekayoḥ	rekeṣu

Compound reka -

Adverb -rekam -rekāt