Clerihews are a quatrain poem form invented by English poet Edmund Clerihew Bentley in 1905 in the collection Biography for Beginners. They utilize a simple AABB rhyme scheme to present famous or historical figures in mundane, anachronistic, or absurd situations.
Abstract poetry or sound poetry relies entirely on the aural quality of the poems produced, often to the complete or partial exclusion of meaning and/or narrative. Abstract poems were first popularized as an idea by Edith Sitwell, though the concept of sound has always been entwined with poetry to some extent.