The best replacement for tendon is ligament.

The best alternatives to tendon are rated as following:
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★★★  muscle
★  aponeurosis
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★  ligament tear
★  cartilage
★  lymph node
★  hamstring
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Speaking about tendon, one probably shouldn't forget about bone spur.

Other search terms related to tendon and their ratings are:
★★★★★ bone spur
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tendon
ligament
ligament injury