Declension table of ?tejasa

Neuter	Singular	Dual	Plural
Nominative	tejasam	tejase	tejasāni
Vocative	tejasa	tejase	tejasāni
Accusative	tejasam	tejase	tejasāni
Instrumental	tejasena	tejasābhyām	tejasaiḥ
Dative	tejasāya	tejasābhyām	tejasebhyaḥ
Ablative	tejasāt	tejasābhyām	tejasebhyaḥ
Genitive	tejasasya	tejasayoḥ	tejasānām
Locative	tejase	tejasayoḥ	tejaseṣu

Compound tejasa -

Adverb -tejasam -tejasāt