Declension table of ?madhuravacana

Neuter	Singular	Dual	Plural
Nominative	madhuravacanam	madhuravacane	madhuravacanāni
Vocative	madhuravacana	madhuravacane	madhuravacanāni
Accusative	madhuravacanam	madhuravacane	madhuravacanāni
Instrumental	madhuravacanena	madhuravacanābhyām	madhuravacanaiḥ
Dative	madhuravacanāya	madhuravacanābhyām	madhuravacanebhyaḥ
Ablative	madhuravacanāt	madhuravacanābhyām	madhuravacanebhyaḥ
Genitive	madhuravacanasya	madhuravacanayoḥ	madhuravacanānām
Locative	madhuravacane	madhuravacanayoḥ	madhuravacaneṣu

Compound madhuravacana -

Adverb -madhuravacanam -madhuravacanāt