Declension table of tribhūma

Neuter	Singular	Dual	Plural
Nominative	tribhūmam	tribhūme	tribhūmāṇi
Vocative	tribhūma	tribhūme	tribhūmāṇi
Accusative	tribhūmam	tribhūme	tribhūmāṇi
Instrumental	tribhūmeṇa	tribhūmābhyām	tribhūmaiḥ
Dative	tribhūmāya	tribhūmābhyām	tribhūmebhyaḥ
Ablative	tribhūmāt	tribhūmābhyām	tribhūmebhyaḥ
Genitive	tribhūmasya	tribhūmayoḥ	tribhūmāṇām
Locative	tribhūme	tribhūmayoḥ	tribhūmeṣu

Compound tribhūma -

Adverb -tribhūmam -tribhūmāt