Declension table of ?viśūla

Masculine	Singular	Dual	Plural
Nominative	viśūlaḥ	viśūlau	viśūlāḥ
Vocative	viśūla	viśūlau	viśūlāḥ
Accusative	viśūlam	viśūlau	viśūlān
Instrumental	viśūlena	viśūlābhyām	viśūlaiḥ viśūlebhiḥ
Dative	viśūlāya	viśūlābhyām	viśūlebhyaḥ
Ablative	viśūlāt	viśūlābhyām	viśūlebhyaḥ
Genitive	viśūlasya	viśūlayoḥ	viśūlānām
Locative	viśūle	viśūlayoḥ	viśūleṣu

Compound viśūla -

Adverb -viśūlam -viśūlāt