Declension table of ?stupa

Masculine	Singular	Dual	Plural
Nominative	stupaḥ	stupau	stupāḥ
Vocative	stupa	stupau	stupāḥ
Accusative	stupam	stupau	stupān
Instrumental	stupena	stupābhyām	stupaiḥ stupebhiḥ
Dative	stupāya	stupābhyām	stupebhyaḥ
Ablative	stupāt	stupābhyām	stupebhyaḥ
Genitive	stupasya	stupayoḥ	stupānām
Locative	stupe	stupayoḥ	stupeṣu

Compound stupa -

Adverb -stupam -stupāt