Purpose

Linking words

Contrast and comparison

While, whereas, in contrast, however, but, (al)though

Reference

Both/neither, all/none

Beginning

First(ly), to begin with, as a start, in the first place

Addition

Second(ly), moreover, in addition, besides, furthermore, not only that,but, what is more

Example

For instance, for example, such as

Paraphrase

In other words, that is to say, to put it another way

Concession

Although, nevertheless, still, yet, in spite of, however, on the contrary

Consequence

As a result, consequently, so, because of, so that, as a consequence

Dominance

Above all, most important of all, best/worst of all, last but not least

Conclusion

On the whole, in conclusion, to sump up, in all, in short