Good point and done, 'cause I don't need the headache.
You know, I remember (vaguely, man I'm making myself feel old realising how long ago it was) when I was about 6 or 7 and was working in the back garden with my parents and being really confused about the difference between a Shovel and a Spade.
My young mind kept thinking, "But they do the same thing! Why's there two names?" Took me ages to get my head around it. It eventually clicked when I was at my grandmothers, she had a coal fire (old mining town, before the mines were all shut and everyone was screwed because they didn't replace the jobs with anything) and I saw a Coal Shovel in action. Basically one's a scoop kind of thing and the other is used to cut into dirt (hence the classic spade shape).
Feels dumb as all hell looking back on it now, but in my defence I was just a kid.