Looking at Onomatopoeia and Metaphor, Simile, Collective Nouns, and my Delusional Dictionary. For definitions of those, click here to read the introductory post to the series. This week’s words: Keen, Kind, Kaleidoscope, Kangaroo. Onomatopoeia: Keen: To ‘keen’ is generally thought of as to make a wailing or moaning sound. But this word can also describe …