Declension table of ?vanaprastha

Neuter	Singular	Dual	Plural
Nominative	vanaprastham	vanaprasthe	vanaprasthāni
Vocative	vanaprastha	vanaprasthe	vanaprasthāni
Accusative	vanaprastham	vanaprasthe	vanaprasthāni
Instrumental	vanaprasthena	vanaprasthābhyām	vanaprasthaiḥ
Dative	vanaprasthāya	vanaprasthābhyām	vanaprasthebhyaḥ
Ablative	vanaprasthāt	vanaprasthābhyām	vanaprasthebhyaḥ
Genitive	vanaprasthasya	vanaprasthayoḥ	vanaprasthānām
Locative	vanaprasthe	vanaprasthayoḥ	vanaprastheṣu

Compound vanaprastha -

Adverb -vanaprastham -vanaprasthāt