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Originally Posted by Slipknot
a roughing gouge is NOT squared off at the end but scraper is.
roughing gouge is concave like you said and curved at the end.
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Actually, I'd call a classic roughing out gouge square at the end. It has a deep U profile in cross section, but the beveled edge is ground square to the it's length (like a broom handle cut square across). As you roll it, the handle does not need to sweep to keep the edge cutting. It has a steep bevel to make a durable shock resistant edge, and the bigger the tool, the better. Don't get one under 3/4", and 1 1/2", though expensive, is better. HSS is also worth the extra price. A spindle gouge has a flatter cross section and a radiused edge curving back from the center of the tool. It serves as a forgiving skew (but leaves a slightly ribbed surface). A bowel gouge is narrower, deeper, but also has a radiused edge (like a fingernail) and isn't much use for plug building.