The term 'tool with a curved blade' can be described by four different words: ADZE (4 letters), ADZ (3 letters), scythe (6 letters), and SICKLE (6 letters). An ADZE is an ancient tool used for smoothing or carving wood, consisting of a curved blade set at right angles to a handle. An ADZ is similar to an ADZE, but has a straight blade instead of a curved one. A scythe is a long-handled tool with a curved blade used for cutting grass or grain. Finally, a SICKLE is a short-handled tool with a curved blade used for harvesting crops.