[tgsovlerkhgsel]

Removal: We take a specific measure to grab carbon from "the environment" and "tow it outside the environment" (capture it in some somewhat-permanent form).

Offset: We go to this poor village and teach them about the importance of not deforesting their surroundings, generously guesstimate how much deforestation that avoids, generously guesstimate how much carbon that will avoid releasing, then sell offsets (twice, because why sell them only once).

Removal is a subset of offsetting, but generally considered a) more concrete, b) actually removing carbon vs. preventing hypothetical future emissions, and as a result, c) more verifiable.