"a hand-saw the teeth of which have more rake and less set than a cross-cut saw, used for cutting wood in the direction of the grain" [Century Dictionary], 1846, from rip (n.) "split timber" (see rip (v.) + saw (n.1)).
ripper
ripping
ripple
rip-rap
riproaring
rip-saw
ripsnorter
rip-tide
rise
risen
riser
