Declension table of ?bhūtatantra

Neuter	Singular	Dual	Plural
Nominative	bhūtatantram	bhūtatantre	bhūtatantrāṇi
Vocative	bhūtatantra	bhūtatantre	bhūtatantrāṇi
Accusative	bhūtatantram	bhūtatantre	bhūtatantrāṇi
Instrumental	bhūtatantreṇa	bhūtatantrābhyām	bhūtatantraiḥ
Dative	bhūtatantrāya	bhūtatantrābhyām	bhūtatantrebhyaḥ
Ablative	bhūtatantrāt	bhūtatantrābhyām	bhūtatantrebhyaḥ
Genitive	bhūtatantrasya	bhūtatantrayoḥ	bhūtatantrāṇām
Locative	bhūtatantre	bhūtatantrayoḥ	bhūtatantreṣu

Compound bhūtatantra -

Adverb -bhūtatantram -bhūtatantrāt