The Collaborative International Dictionary
Colonizationist
Colonizationist \Col`o*ni*za"tion*ist\, n. A friend to colonization, esp. (U. S. Hist) to the colonization of Africa by emigrants from the colored population of the United States.
Wiktionary
colonizationist
n. An advocate of colonizationism.
Usage examples of "colonizationist".
I have noted the struggle between abolitionist and colonizationist, and have received some impressions, as a distant spectator, which could never have occurred to me as a participator.