indeed, furthermore, moreover, additionally, and, also, both x and y, not only x but also y, besides x, in fact

moreover, more, in addition, additionally, besides, further, further to this, also, as well, then, what's more (informal), to boot (informal), for good measure, on top of that (informal)

Many transitional words are nearly synonymous: words that broadly indicate that “this follows logically from the preceding” include accordingly, therefore, and consequently. Words that mean “in addition to” include moreover, besides, and further. Words that mean “contrary to what was just stated” include however, nevertheless, and nonetheless.