1. A method implemented by an information handling system that includes a memory and a processor, the method comprising: analyzing a plurality of words included in a plurality of electronic documents, wherein the analysis identifies at least one of the plurality of words as being a portmanteau; identifying a plurality of morphemes included in the identified portmanteau and one or more candidate words that correspond to each of the identified morphemes, wherein each of the candidate words has a candidate word definition; deriving a portmanteau definition corresponding to the identified portmanteau from at least two of the candidate word definitions; and storing the identified portmanteau and the derived portmanteau definition in a dictionary utilized by a question answering (QA) system.