Declension table of ?sumbha

Masculine	Singular	Dual	Plural
Nominative	sumbhaḥ	sumbhau	sumbhāḥ
Vocative	sumbha	sumbhau	sumbhāḥ
Accusative	sumbham	sumbhau	sumbhān
Instrumental	sumbhena	sumbhābhyām	sumbhaiḥ sumbhebhiḥ
Dative	sumbhāya	sumbhābhyām	sumbhebhyaḥ
Ablative	sumbhāt	sumbhābhyām	sumbhebhyaḥ
Genitive	sumbhasya	sumbhayoḥ	sumbhānām
Locative	sumbhe	sumbhayoḥ	sumbheṣu

Compound sumbha -

Adverb -sumbham -sumbhāt