0.00000001 = satoshi
0.00000010 = dekatoshi / dekasat
0.00000100 = hectoshi / hesat
0.00001000 = kiltoshi / kilosat
0.01000000 = megatoshi / megasat
I don't think the first four are necessary. More terms equals more confusion, so it's best to stick to as few denominations as possible. Saying 1k sats is much simpler and less confusing than saying 1 kilosat, for example.
I could get behind megatoshi, but isn't cBTC (centi-BTC) already in (ableit rare and informal) use?