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Start with the full category, then apply the exact boundary: Use the EIA’s five broad categories. Tidal and wave energy are not separate entries in this particular list. You only need one qualifying answer. A longer name is not automatically rarer.
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BiomassBiomass · 85 points · 7 characters
Biomass is renewable organic material from plants and animals.
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Biomass85 points · Shortest accepted spelling: Biomass
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- Apply the complete question boundary: Use the EIA’s five broad categories. Tidal and wave energy are not separate entries in this particular list.
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Source: US Energy Information Administration · Renewable energy ↗
Reference version: 2026-10-21. See our answer policy for how we handle aliases and omissions.