That is what I'm doing. I'm using <pre> to force fixed-width font, and each line has an amount of leading whitespace calculated to make the "concordance terms" align. It looks right for me. Maybe you have browser/font config issues?

Why not just set it up as a 3-column table, with the concordance term as the middle column?

That's what I had originally. Actually, I only had two table columns, since I did not have the concept of a "concordance term"; I simply sorted the by right-hand side of the cut. Maybe I'll go back to that. But I feel there's a certain elegance in the "just shift each line to achieve desired alignment" approach.