Yes, Don, I'm aware that "reveal" was once related to achitectural mouldings itself, but that expression seemingly never caught on here on the West Coast. Many of the historical restorations I personally worked on actually involved what was originally Old World craftsmen, woodworkers and plasterers of the highest order, brought over by Julia Morgan; some were British, but many were Italian and no doubt had their own special terminology. In any kind of repair or window replacement, or inset moulding work, the term "rabbet" had become at least a generation before me. My more permanent job, a few year later until my retirement, was working for one of the biggest window distributors in the country, which was also a significant local moulding supplier (it was spelled both ways, molding or more often the spiffier moulding). Top-end quality products, 98% pro clientele. My end of it was mainly machinery, coatings, builders hardware, restoration consultation, and if requested, architectural photography. The owner actively encouraged moonlight income, even in an overlapping manner, because it brought in a lot of extra quality business. But I'm quite aware how terminology often differs coast to coast.
We also shipped trans-Pacific, as well as imported across the water. I set up the first Makita store display in the US; but we also offered a huge selection of Japanese hand tools - more of the carpentry variety. The man who had the connections had his own specialty store a mile away if you wanted something like a $400 chisel made by a famous Japanese sword-maker, of a personally signed plane by someone highly recognized over there. I have no idea what their term for rabbet is; all the boxes and packaging were printed in Japanese. He's retired; but the specialty shop is still there, with a wonderful selection if you can afford it. I was cussing at my thirty buck pole saw the other day, pruning limbs. The upscale landscapers go into that Japanese tool shop and spend $360 on one.