The best replacement for tumbleweed is sagebrush.

The best alternatives to tumbleweed are rated as following:
★★★★★  sagebrush
★★★★  ironport
★  roundup

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Speaking about tumbleweed, one probably shouldn't forget about neith.

Other search terms related to tumbleweed and their ratings are:
★★★★★ neith
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tumbleweed
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