The best replacement for monsters is aliens.

The best alternatives to monsters are rated as following:
★★★★★  aliens
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★  aliens viooz
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  monsters
  robots
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  mascots
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  humans
  dragons

Your alternative for monsters is not listed? Suggest!
Speaking about monsters, one probably shouldn't forget about fred savage.

Other search terms related to monsters and their ratings are:
★★★★★ fred savage
★★ david attenborough
You have in mind a companion for monsters and it is not yet here? Propose!



Google Trends

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monsters
aliens
aliens cast