Declension table of ?samarotsava

Masculine	Singular	Dual	Plural
Nominative	samarotsavaḥ	samarotsavau	samarotsavāḥ
Vocative	samarotsava	samarotsavau	samarotsavāḥ
Accusative	samarotsavam	samarotsavau	samarotsavān
Instrumental	samarotsavena	samarotsavābhyām	samarotsavaiḥ samarotsavebhiḥ
Dative	samarotsavāya	samarotsavābhyām	samarotsavebhyaḥ
Ablative	samarotsavāt	samarotsavābhyām	samarotsavebhyaḥ
Genitive	samarotsavasya	samarotsavayoḥ	samarotsavānām
Locative	samarotsave	samarotsavayoḥ	samarotsaveṣu

Compound samarotsava -

Adverb -samarotsavam -samarotsavāt