Improvisation rhymes with:
collectivization, amortization, balkanization, cannibalization, capitalization, categorization, cauterization, centralization, characterization, civilization, collectivization, colonization, commercialization, computerization, decentralization, demoralization, denationalization, equalization, fertilization, finlandization, generalization, genetization, globalization, harmonization, industrialization, institutionalization, internationalization, liberalization, maximization, miniaturization, monopolization, normalization, organisation, pressurization, radicalization, rationalization, reauthorization, recapitalization, renationalization, saudiization, singularization, socialization, stalinization, standardization, subsidization, suburbanization, vulgarization, westernization