Declension table of ?samudravasana

Masculine	Singular	Dual	Plural
Nominative	samudravasanaḥ	samudravasanau	samudravasanāḥ
Vocative	samudravasana	samudravasanau	samudravasanāḥ
Accusative	samudravasanam	samudravasanau	samudravasanān
Instrumental	samudravasanena	samudravasanābhyām	samudravasanaiḥ
Dative	samudravasanāya	samudravasanābhyām	samudravasanebhyaḥ
Ablative	samudravasanāt	samudravasanābhyām	samudravasanebhyaḥ
Genitive	samudravasanasya	samudravasanayoḥ	samudravasanānām
Locative	samudravasane	samudravasanayoḥ	samudravasaneṣu

Compound samudravasana -

Adverb -samudravasanam -samudravasanāt