Here is the OED for you to play with.
Topic 1: alligator, banana (Tim), canoe (Alex), chocolate (Cheratra),
(Brad), guitar (Dale), ketchup (Senka),
moose (Andrea), plunder, potato, sherris (Jennifer), tea (Jan), tobacco
word of your
choice (non-classical, trade/colonial, pre-1700). Stop press:
Topic 2: barbarian/barbarous (Jen), cannibal (Jan), caste (Susana), creole (Tim), horde, India/n (Senka), Mussulman (Alex), native, negro (Cheratra), nigger (Brad), pariah (Zach), race, savage (Dale), Shemite (Rebecca), tribe (Dan), vulgar (Andrea); a word of your choice (denoting "Others")
Topic 3 (if you don't like Topic 1 or Topic 2): Use Ian Lancashire's Early Modern English Dictionaries Database to identify what kinds of headwords are included in early English-English dictionaries (i.e., not English-Italian or Latin-English) and how they are treated. Pick a semantic field where you expect to find "native" words coexisting with "hard" words (anatomy, disease?), or pick a semantic field that you're just plain interested in. Words might include: bugger, piss, pox, dictionar* ...
In order to use EMEDD, you'll need to get a password. You can do this independently, or may email CP for her "class" password.