Declension table of ?karmārambha

Masculine	Singular	Dual	Plural
Nominative	karmārambhaḥ	karmārambhau	karmārambhāḥ
Vocative	karmārambha	karmārambhau	karmārambhāḥ
Accusative	karmārambham	karmārambhau	karmārambhān
Instrumental	karmārambheṇa	karmārambhābhyām	karmārambhaiḥ karmārambhebhiḥ
Dative	karmārambhāya	karmārambhābhyām	karmārambhebhyaḥ
Ablative	karmārambhāt	karmārambhābhyām	karmārambhebhyaḥ
Genitive	karmārambhasya	karmārambhayoḥ	karmārambhāṇām
Locative	karmārambhe	karmārambhayoḥ	karmārambheṣu

Compound karmārambha -

Adverb -karmārambham -karmārambhāt