Synonyms and related words :
ab initio, ab ovo, aborigine, at first, at the start, before everything, by birth, by nature, chiefly, congenitally, first, first and foremost, first thing, firstly, from the beginning, genetically, immanently, in the beginning, initially, innately, internally, intrinsically, inwardly, mainly, naturally, primally, primarily, primitively, primo, principally