Words are CATegorical (2003–2010)
- Dearly, Nearly, Insincerely (2003)
- I and You and Don't Forget Who (2004)
- Pitch and Throw, Grasp and Know (2005)
- Stop and Go, Yes and No (2006)
- Quirky, Jerky, Extra Perky (2007)
- Skin Like Milk, Hair of Silk (2009)
- Straight and Curvy, Meek and Nervy (2009)
- But and For, Yet and Nor (2010)
- I'm and Won't, They're and Don't (2010)