Declension table of ?ṛchat

Masculine	Singular	Dual	Plural
Nominative	ṛchan	ṛchantau	ṛchantaḥ
Vocative	ṛchan	ṛchantau	ṛchantaḥ
Accusative	ṛchantam	ṛchantau	ṛchataḥ
Instrumental	ṛchatā	ṛchadbhyām	ṛchadbhiḥ
Dative	ṛchate	ṛchadbhyām	ṛchadbhyaḥ
Ablative	ṛchataḥ	ṛchadbhyām	ṛchadbhyaḥ
Genitive	ṛchataḥ	ṛchatoḥ	ṛchatām
Locative	ṛchati	ṛchatoḥ	ṛchatsu

Compound ṛchat -

Adverb -ṛchantam