Declension table of ?śira

Masculine	Singular	Dual	Plural
Nominative	śiraḥ	śirau	śirāḥ
Vocative	śira	śirau	śirāḥ
Accusative	śiram	śirau	śirān
Instrumental	śireṇa	śirābhyām	śiraiḥ śirebhiḥ
Dative	śirāya	śirābhyām	śirebhyaḥ
Ablative	śirāt	śirābhyām	śirebhyaḥ
Genitive	śirasya	śirayoḥ	śirāṇām
Locative	śire	śirayoḥ	śireṣu

Compound śira -

Adverb -śiram -śirāt