Source: Fake Science Tumblr
So, you'd think that WWF would allow submission of any legal word, right? Well, since language constantly evolves, the designers limited choices to a public-domain word list, ENABLE, containing ~173,000 words. Quite a lot, really, until you compare that to SOWPODS, the tournament Scrabble players' list, weighing in at 267,000 (and counting!).
The ENABLE list, ranging from "aa" (lava) to "zyzzyvas" (a weevil), represents scientific fields from anthropology to zoology. Large 'blocks' of terms deal with nuclear energy, geology, physics, and biology. So, what about chemistry?
I spent a few minutes trawling the list, then picking the brains of my colleagues. With this (very) minor effort, we found just a handful of terms missing: ipso, meso, fluorous, and chiron. [Words we guessed might not be there, but were, included: carbocycle, solute, solvent, catalyst, nucleophile, polydisperse, synclinal, catechol, aglycon, zincate, chiral, orbital, glycine, alkali, ketone, and bromide.]
All in all, more chemical variety than I had expected. Readers, I've obviously not covered the gamut of chemical terms, so if you find ENABLE lacking, let me know in the comments. Or, better yet, let Zynga know!