Declension table of ?sūryatvaca

Neuter	Singular	Dual	Plural
Nominative	sūryatvacam	sūryatvace	sūryatvacāni
Vocative	sūryatvaca	sūryatvace	sūryatvacāni
Accusative	sūryatvacam	sūryatvace	sūryatvacāni
Instrumental	sūryatvacena	sūryatvacābhyām	sūryatvacaiḥ
Dative	sūryatvacāya	sūryatvacābhyām	sūryatvacebhyaḥ
Ablative	sūryatvacāt	sūryatvacābhyām	sūryatvacebhyaḥ
Genitive	sūryatvacasya	sūryatvacayoḥ	sūryatvacānām
Locative	sūryatvace	sūryatvacayoḥ	sūryatvaceṣu

Compound sūryatvaca -

Adverb -sūryatvacam -sūryatvacāt