Declension table of ?goṣṭhika

Neuter	Singular	Dual	Plural
Nominative	goṣṭhikam	goṣṭhike	goṣṭhikāni
Vocative	goṣṭhika	goṣṭhike	goṣṭhikāni
Accusative	goṣṭhikam	goṣṭhike	goṣṭhikāni
Instrumental	goṣṭhikena	goṣṭhikābhyām	goṣṭhikaiḥ
Dative	goṣṭhikāya	goṣṭhikābhyām	goṣṭhikebhyaḥ
Ablative	goṣṭhikāt	goṣṭhikābhyām	goṣṭhikebhyaḥ
Genitive	goṣṭhikasya	goṣṭhikayoḥ	goṣṭhikānām
Locative	goṣṭhike	goṣṭhikayoḥ	goṣṭhikeṣu

Compound goṣṭhika -

Adverb -goṣṭhikam -goṣṭhikāt