CARBON FILTERcarbon filter · English · Reference checkedReferenceOpen English WordNet 2024oewn2024:lemma:CARBON FILTERTier 1Ordinal123Pythagorean60Classical117Reverse201Reverse Reduction75Standard1078Final Large1728Ordinal142Reduced34Atbash466Isopsephy1188Ordinal153Abjad1000