The best replacement for sheer force is guts.

The best alternatives to sheer force are rated as following:
★★★★★  guts
★★★  iron fist
★★★  guts conkeldurr
★★  shear force
★  zen mode
★  keen eye

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Speaking about sheer force, one probably shouldn't forget about life orb.

Other search terms related to sheer force and their ratings are:
★★★★★ life orb
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sheer force
guts
iron fist