A conjunction links two clauses in one sentence, whereas a conjunctive adverb links ideas in different sentences.

I don't blame racists, sexists, lookists, or any other “ists” for what they personify and perpetuate. They are mere hostages of their egos.

People with AIDS tend to die after years of suffering, often screaming from the agony of cryptococcal meningitis or choking on thrush fungus.

He has considerably improved upon the planing machine, in his “Jim Crow” machine, so called because the cutter reverses itself and works both ways, and in fact adapts itself to any position to do its work.