From The Collaborative International Dictionary of English v.0.44 [gcide]:
Naturalization \Nat'u*ral*i*za"tion\, noun [Cf. F. naturalisation.] The act or process of naturalizing, esp. of investing an alien with the rights and privileges of a native or citizen; also, the state of being naturalized.
From WordNet (r) 2.0 [wn]:
From Moby Thesaurus II by Grady Ward, 1.0 [moby-thes]:
57 Moby Thesaurus words for "naturalization": Americanization, about-face, acclimation, acclimatization, accommodation, acculturation, accustoming, adaption, adjustment, admission, adoption, affiliation, alchemy, assimilation, assumption, becoming, breaking, breaking-in, case hardening, change, change-over, citizenship by naturalization, citizenship papers, conditioning, conversion, culture shock, domestication, familiarization, flip-flop, growth, habituation, hardening, housebreaking, inurement, lapse, nationalization, naturalized citizenship, orientation, papers, passage, progress, re-formation, reconversion, reduction, resolution, reversal, seasoning, shift, switch, switch-over, taming, training, transformation, transit, transition, turning into, volte-face
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