Declension table of tamasa

Neuter	Singular	Dual	Plural
Nominative	tamasam	tamase	tamasāni
Vocative	tamasa	tamase	tamasāni
Accusative	tamasam	tamase	tamasāni
Instrumental	tamasena	tamasābhyām	tamasaiḥ
Dative	tamasāya	tamasābhyām	tamasebhyaḥ
Ablative	tamasāt	tamasābhyām	tamasebhyaḥ
Genitive	tamasasya	tamasayoḥ	tamasānām
Locative	tamase	tamasayoḥ	tamaseṣu

Compound tamasa -

Adverb -tamasam -tamasāt