IMPROVISATIZE

\ˈɪmpɹəvˌɪsɐtˌa͡ɪz], \ˈɪmpɹəvˌɪsɐtˌa‍ɪz], \ˈɪ_m_p_ɹ_ə_v_ˌɪ_s_ɐ_t_ˌaɪ_z]\
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2010 - New Age Dictionary Database
By Oddity Software
 
1913 - Webster's Revised Unabridged Dictionary
By Noah Webster.