Declension table of ?goṣṭhāṣṭamī

Feminine	Singular	Dual	Plural
Nominative	goṣṭhāṣṭamī	goṣṭhāṣṭamyau	goṣṭhāṣṭamyaḥ
Vocative	goṣṭhāṣṭami	goṣṭhāṣṭamyau	goṣṭhāṣṭamyaḥ
Accusative	goṣṭhāṣṭamīm	goṣṭhāṣṭamyau	goṣṭhāṣṭamīḥ
Instrumental	goṣṭhāṣṭamyā	goṣṭhāṣṭamībhyām	goṣṭhāṣṭamībhiḥ
Dative	goṣṭhāṣṭamyai	goṣṭhāṣṭamībhyām	goṣṭhāṣṭamībhyaḥ
Ablative	goṣṭhāṣṭamyāḥ	goṣṭhāṣṭamībhyām	goṣṭhāṣṭamībhyaḥ
Genitive	goṣṭhāṣṭamyāḥ	goṣṭhāṣṭamyoḥ	goṣṭhāṣṭamīnām
Locative	goṣṭhāṣṭamyām	goṣṭhāṣṭamyoḥ	goṣṭhāṣṭamīṣu

Compound goṣṭhāṣṭami - goṣṭhāṣṭamī -

Adverb -goṣṭhāṣṭami