Declension table of ?sahārthatva

Neuter	Singular	Dual	Plural
Nominative	sahārthatvam	sahārthatve	sahārthatvāni
Vocative	sahārthatva	sahārthatve	sahārthatvāni
Accusative	sahārthatvam	sahārthatve	sahārthatvāni
Instrumental	sahārthatvena	sahārthatvābhyām	sahārthatvaiḥ
Dative	sahārthatvāya	sahārthatvābhyām	sahārthatvebhyaḥ
Ablative	sahārthatvāt	sahārthatvābhyām	sahārthatvebhyaḥ
Genitive	sahārthatvasya	sahārthatvayoḥ	sahārthatvānām
Locative	sahārthatve	sahārthatvayoḥ	sahārthatveṣu

Compound sahārthatva -

Adverb -sahārthatvam -sahārthatvāt