Declension table of ?suvacana

Masculine	Singular	Dual	Plural
Nominative	suvacanaḥ	suvacanau	suvacanāḥ
Vocative	suvacana	suvacanau	suvacanāḥ
Accusative	suvacanam	suvacanau	suvacanān
Instrumental	suvacanena	suvacanābhyām	suvacanaiḥ suvacanebhiḥ
Dative	suvacanāya	suvacanābhyām	suvacanebhyaḥ
Ablative	suvacanāt	suvacanābhyām	suvacanebhyaḥ
Genitive	suvacanasya	suvacanayoḥ	suvacanānām
Locative	suvacane	suvacanayoḥ	suvacaneṣu

Compound suvacana -

Adverb -suvacanam -suvacanāt