The crossword solution for the term 'SONNET OR HAIKU, E.G.' is POEM, which is a four letter word. A POEM is a type of literary work that expresses emotions or ideas in a creative and often rhythmic way. Sonnets and haikus are two of the most popular types of poems. A sonnet is a fourteen line POEM that typically follows a specific rhyme scheme and structure, while a haiku is a three line POEM that follows a specific syllable pattern.