Declension table of ?samāntara

Masculine	Singular	Dual	Plural
Nominative	samāntaraḥ	samāntarau	samāntarāḥ
Vocative	samāntara	samāntarau	samāntarāḥ
Accusative	samāntaram	samāntarau	samāntarān
Instrumental	samāntareṇa	samāntarābhyām	samāntaraiḥ samāntarebhiḥ
Dative	samāntarāya	samāntarābhyām	samāntarebhyaḥ
Ablative	samāntarāt	samāntarābhyām	samāntarebhyaḥ
Genitive	samāntarasya	samāntarayoḥ	samāntarāṇām
Locative	samāntare	samāntarayoḥ	samāntareṣu

Compound samāntara -

Adverb -samāntaram -samāntarāt