portmanteau

blend; usu., a word that is composed of parts of two words (such as chortle from chuckle and snort), all of one word and part of another (such as bookmobile from book and automobile), or two entire words and that is characterized invariably in the latter case and frequently in the two former cases by single occurrence of one or more sounds or letters that appear in both the component words (such as motel from motor hotel, camporee from camp and jamboree, aniseed from anise seed)