The best replacement for hearth is fireplace.

The best alternatives to hearth are rated as following:
★★★★★  fireplace
★★★★★  no hearth
★  heart

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Speaking about hearth, one probably shouldn't forget about gas fireplace.

Other search terms related to hearth and their ratings are:
★★★★★ gas fireplace
You have in mind a companion for hearth and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of hearth in all years. Click on graph for more.
hearth
fireplace
no hearth