(neologism) A word formed by combining two (or more) other words; a portmanteau.
2005, December 15, Ruma Singh, Know some good frankenwords?, But what's noteworthy is the smorgasbord of new vocabulary, including 'frankenwords' (words joined to create new words) which deal with everyday situations.
2007, February 1, M. Thelwall & R. Prabowo, Identifying and characterising public science-related fears from RSS feeds, Noun phrase identification is extremely time consuming and may incorrectly process new words that emerge during a debate, eg frankenwords invented during the genetically modified food debate.
2009, Fall, Ann duCille, Marriage, Family, and Other" Peculiar Institutions" in African-American Literary History, A combination of "salvation" and "sacrifice," the coinage "salvific" does not necessarily flow trippingly from the tongue, but the monograph hardly needs a frankenword to make the case for the enduring relationship between African-American letters and racial uplift.