Declension table of ?sahasrasaṃvatsara

Neuter	Singular	Dual	Plural
Nominative	sahasrasaṃvatsaram	sahasrasaṃvatsare	sahasrasaṃvatsarāṇi
Vocative	sahasrasaṃvatsara	sahasrasaṃvatsare	sahasrasaṃvatsarāṇi
Accusative	sahasrasaṃvatsaram	sahasrasaṃvatsare	sahasrasaṃvatsarāṇi
Instrumental	sahasrasaṃvatsareṇa	sahasrasaṃvatsarābhyām	sahasrasaṃvatsaraiḥ
Dative	sahasrasaṃvatsarāya	sahasrasaṃvatsarābhyām	sahasrasaṃvatsarebhyaḥ
Ablative	sahasrasaṃvatsarāt	sahasrasaṃvatsarābhyām	sahasrasaṃvatsarebhyaḥ
Genitive	sahasrasaṃvatsarasya	sahasrasaṃvatsarayoḥ	sahasrasaṃvatsarāṇām
Locative	sahasrasaṃvatsare	sahasrasaṃvatsarayoḥ	sahasrasaṃvatsareṣu

Compound sahasrasaṃvatsara -

Adverb -sahasrasaṃvatsaram -sahasrasaṃvatsarāt