Declension table of ?āpsara

Masculine	Singular	Dual	Plural
Nominative	āpsaraḥ	āpsarau	āpsarāḥ
Vocative	āpsara	āpsarau	āpsarāḥ
Accusative	āpsaram	āpsarau	āpsarān
Instrumental	āpsareṇa	āpsarābhyām	āpsaraiḥ āpsarebhiḥ
Dative	āpsarāya	āpsarābhyām	āpsarebhyaḥ
Ablative	āpsarāt	āpsarābhyām	āpsarebhyaḥ
Genitive	āpsarasya	āpsarayoḥ	āpsarāṇām
Locative	āpsare	āpsarayoḥ	āpsareṣu

Compound āpsara -

Adverb -āpsaram -āpsarāt