Cohesive Devices are words or phrases that connect ideas that make your writing logical and more coherent, additionally, it is also called as transitional devices.
The four functions of cohesive devices are to give additional information, show contrast, give highlight, and to do reformulation or to restate again.
Five words to give additional information is on top of that, moreover, additionally, in addition, and furthermore.
Five words to show contrast are except, unless, while, on the other hand, and although or even though.
The difference between although and even though is that although is informal and is used in daily conversations while even though is formal and is used in academic writing such as research or theme papers.
Five words to give highlight are especially, mainly, above all, in particular, and particularly.
Five words to do reformulation or to restate again are put more simply, rather, in other words, in simple term, and that is to say.