Declension table of ?astamastaka

Neuter	Singular	Dual	Plural
Nominative	astamastakam	astamastake	astamastakāni
Vocative	astamastaka	astamastake	astamastakāni
Accusative	astamastakam	astamastake	astamastakāni
Instrumental	astamastakena	astamastakābhyām	astamastakaiḥ
Dative	astamastakāya	astamastakābhyām	astamastakebhyaḥ
Ablative	astamastakāt	astamastakābhyām	astamastakebhyaḥ
Genitive	astamastakasya	astamastakayoḥ	astamastakānām
Locative	astamastake	astamastakayoḥ	astamastakeṣu

Compound astamastaka -

Adverb -astamastakam -astamastakāt