To Show Addition: also, in addition, moreover, furthermore, besides, equally important, too.
To Show Contrast: however, on the other hand, nevertheless, nonetheless, conversely, in contrast, despite, although, even though, yet.
To Show Cause and Effect: therefore, thus, consequently, as a result, hence, because, since, so.
To Show Examples/Illustration: for example, for instance, specifically, to illustrate, such as.
To Show Similarity: similarly, likewise, in the same way, just as.
To Show Emphasis: indeed, in fact, certainly, undoubtedly, without a doubt.
To Show Sequence/Order: first, second, third, next, then, finally, subsequently, after, before.
To Summarize/Conclude: in summary, in conclusion, therefore, in short, to sum up.