Declension table of ?upaja

Neuter	Singular	Dual	Plural
Nominative	upajam	upaje	upajāni
Vocative	upaja	upaje	upajāni
Accusative	upajam	upaje	upajāni
Instrumental	upajena	upajābhyām	upajaiḥ
Dative	upajāya	upajābhyām	upajebhyaḥ
Ablative	upajāt	upajābhyām	upajebhyaḥ
Genitive	upajasya	upajayoḥ	upajānām
Locative	upaje	upajayoḥ	upajeṣu

Compound upaja -

Adverb -upajam -upajāt