Declension table of ?śāntivrata

Neuter	Singular	Dual	Plural
Nominative	śāntivratam	śāntivrate	śāntivratāni
Vocative	śāntivrata	śāntivrate	śāntivratāni
Accusative	śāntivratam	śāntivrate	śāntivratāni
Instrumental	śāntivratena	śāntivratābhyām	śāntivrataiḥ
Dative	śāntivratāya	śāntivratābhyām	śāntivratebhyaḥ
Ablative	śāntivratāt	śāntivratābhyām	śāntivratebhyaḥ
Genitive	śāntivratasya	śāntivratayoḥ	śāntivratānām
Locative	śāntivrate	śāntivratayoḥ	śāntivrateṣu

Compound śāntivrata -

Adverb -śāntivratam -śāntivratāt