therm / thurm [θɜrm]
therm – n. & v. – n. – 1. any of several heat units such as a calorie; 2. the quantity of gas needed to produce 100,000 btus of heat; 3. a public bath; v.-18th century cabinet making – to form a tapering, rectangular leg of a chair, table etc.
thurm – v. – 1. to work with a chisel and saw, across the wood grain; 2. on a lathe - square turning