10
dross(noun, trash, rubbish, remains, debris)
9
slag(noun, debris)
4
cinder
4
clinker
4
scum
3
coal(noun, cleaner, bitumen)
3
lava(noun, matter, debris, obsidian)
3
trash
2
ashes(debris, slag)
2
basalt(noun, slag, obsidian)
2
charcoal(slack, cleaner, bitumen)
2
cinders
2
dregs
2
magma(noun, slag, obsidian)
2
rubble
2
sinter
2
soot
1
abyssal rock
1
alluvion
1
alluvium
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APASmart Define. (2015). Scoria thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/scoria/thesaurus/synonyms
ChicagoSmart Define. 2015. "Scoria thesaurus" https://smartdefine.org/scoria/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, Scoria thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/scoria/thesaurus/synonyms>.
MLASmart Define. "Scoria thesaurus" 10 April 2015. Web. 20 September 2026. <https://smartdefine.org/scoria/thesaurus/synonyms>