maaan. i know i have been studying too much when is started reading words with a little twist....
periodic: i read as per-iodic (as in per-iodic acid. no no its not the acid that forms every twenty minutes)
unionized: as un-ionized..
I think chemistry has left an indelible imprint in my head, (just like being struck on it by a lead filled cosh.

Btw: you know when you go to someones house in Scotland, they welcome you with a plate on which there is a small lamp and they marofy a few chukkers and go off...you know what they call it ? Mcarthy.