Any word made by combining two other
words to form a new, shortened single word.
Tword does what it says on the tin, as it is itself a word made by combining the two
words, two
words.
Popular
slang examples include cankles (calf/ankles made famous by Shallow Hal) and
moobs (man
boobs) while marketeers delight in the creation of twords to describe either their products or market segments, for example infomercial and edutainment.