[verb]ing [prepositional phrase] [article] [adjective] [noun] ...repeat Examples: "Walking in a gallery of angry faces," "Gazing upon the Moonlit canyon," "Climbing up a fraying rope." You need to subcategorize your word categories. For example, some nouns are about Nature, some are about People, many nouns are about neither of those. That way you can weight certain choices when quasi-randomly-selecting them. One of the weighting factors would be if they fit the meter readily or not.