Declension table of ?sahasracitya

Masculine	Singular	Dual	Plural
Nominative	sahasracityaḥ	sahasracityau	sahasracityāḥ
Vocative	sahasracitya	sahasracityau	sahasracityāḥ
Accusative	sahasracityam	sahasracityau	sahasracityān
Instrumental	sahasracityena	sahasracityābhyām	sahasracityaiḥ sahasracityebhiḥ
Dative	sahasracityāya	sahasracityābhyām	sahasracityebhyaḥ
Ablative	sahasracityāt	sahasracityābhyām	sahasracityebhyaḥ
Genitive	sahasracityasya	sahasracityayoḥ	sahasracityānām
Locative	sahasracitye	sahasracityayoḥ	sahasracityeṣu

Compound sahasracitya -

Adverb -sahasracityam -sahasracityāt