Declension table of ?harivrata

Masculine	Singular	Dual	Plural
Nominative	harivrataḥ	harivratau	harivratāḥ
Vocative	harivrata	harivratau	harivratāḥ
Accusative	harivratam	harivratau	harivratān
Instrumental	harivratena	harivratābhyām	harivrataiḥ harivratebhiḥ
Dative	harivratāya	harivratābhyām	harivratebhyaḥ
Ablative	harivratāt	harivratābhyām	harivratebhyaḥ
Genitive	harivratasya	harivratayoḥ	harivratānām
Locative	harivrate	harivratayoḥ	harivrateṣu

Compound harivrata -

Adverb -harivratam -harivratāt