1) Log cutter 2) Log cutter for two 3) Two-handed log cutter 4) Two-handed saw 5) Two-person cutter 6) Two-person log cutter 7) Two-person tool 8) Whipsaw 
[n] - a large two-handed saw formerly used to cut logs into planks
noun a large two-handed saw formerly used to cut logs into planks; one man stood above the log and the other in a pit below