Declension table of viśvamitra

Masculine	Singular	Dual	Plural
Nominative	viśvamitraḥ	viśvamitrau	viśvamitrāḥ
Vocative	viśvamitra	viśvamitrau	viśvamitrāḥ
Accusative	viśvamitram	viśvamitrau	viśvamitrān
Instrumental	viśvamitreṇa	viśvamitrābhyām	viśvamitraiḥ viśvamitrebhiḥ
Dative	viśvamitrāya	viśvamitrābhyām	viśvamitrebhyaḥ
Ablative	viśvamitrāt	viśvamitrābhyām	viśvamitrebhyaḥ
Genitive	viśvamitrasya	viśvamitrayoḥ	viśvamitrāṇām
Locative	viśvamitre	viśvamitrayoḥ	viśvamitreṣu

Compound viśvamitra -

Adverb -viśvamitram -viśvamitrāt