Declension table of ?samardhana

Neuter	Singular	Dual	Plural
Nominative	samardhanam	samardhane	samardhanāni
Vocative	samardhana	samardhane	samardhanāni
Accusative	samardhanam	samardhane	samardhanāni
Instrumental	samardhanena	samardhanābhyām	samardhanaiḥ
Dative	samardhanāya	samardhanābhyām	samardhanebhyaḥ
Ablative	samardhanāt	samardhanābhyām	samardhanebhyaḥ
Genitive	samardhanasya	samardhanayoḥ	samardhanānām
Locative	samardhane	samardhanayoḥ	samardhaneṣu

Compound samardhana -

Adverb -samardhanam -samardhanāt