Declension table of ?paryāyatva

Neuter	Singular	Dual	Plural
Nominative	paryāyatvam	paryāyatve	paryāyatvāni
Vocative	paryāyatva	paryāyatve	paryāyatvāni
Accusative	paryāyatvam	paryāyatve	paryāyatvāni
Instrumental	paryāyatvena	paryāyatvābhyām	paryāyatvaiḥ
Dative	paryāyatvāya	paryāyatvābhyām	paryāyatvebhyaḥ
Ablative	paryāyatvāt	paryāyatvābhyām	paryāyatvebhyaḥ
Genitive	paryāyatvasya	paryāyatvayoḥ	paryāyatvānām
Locative	paryāyatve	paryāyatvayoḥ	paryāyatveṣu

Compound paryāyatva -

Adverb -paryāyatvam -paryāyatvāt