Matthew Stibbe suggested some writer’s reference sites. My suggestions: The Online Etymology Dictionary offers a brief history of words. You’ll enjoy it if you’re just reflexively curious like me. And maybe you don’t need to bookmark it, but I like the Plain English Campaign‘s A to Z of Alternative Words [pdf].
From Matthew’s list, I like love want to marry the Handbook of Rhetorical Devices. [that’s sort of modern-day metanoia, btw]