The best replacement for similes is metaphors.

The best alternatives to similes are rated as following:
★★★★★  metaphors
★★★  metaphors worksheets
★★★  metaphors powerpoint
★★★  metaphors worksheet
★★  metaphor
★  comparisons

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Speaking about similes, one probably shouldn't forget about picture books.

Other search terms related to similes and their ratings are:
★★★★★ picture books
poems
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