Declension table of ?śabdamātra

Neuter	Singular	Dual	Plural
Nominative	śabdamātram	śabdamātre	śabdamātrāṇi
Vocative	śabdamātra	śabdamātre	śabdamātrāṇi
Accusative	śabdamātram	śabdamātre	śabdamātrāṇi
Instrumental	śabdamātreṇa	śabdamātrābhyām	śabdamātraiḥ
Dative	śabdamātrāya	śabdamātrābhyām	śabdamātrebhyaḥ
Ablative	śabdamātrāt	śabdamātrābhyām	śabdamātrebhyaḥ
Genitive	śabdamātrasya	śabdamātrayoḥ	śabdamātrāṇām
Locative	śabdamātre	śabdamātrayoḥ	śabdamātreṣu

Compound śabdamātra -

Adverb -śabdamātram -śabdamātrāt