Question: what is it called when two words make one word?
Answer: Portmanteau. ... listen), /ˌpɔːrtmænˈtoʊ/) or portmanteau word (from French "coat rack") is a linguistic blend of words, in which parts of multiple words or their phonemes (sounds) are combined into a new word, as in smog, coined by blending smoke and fog, or motel, from motor and hotel.