When we want to describe something as being in the extreme, it can be helpful to use synonyms to really emphasize just how extreme it is. Some great synonyms for in the extreme include: exceedingly, exceptionally, excessively, extremely, immeasurably, intensely, markedly, over-the-top, profoundly, remarkably, severely, surpassingly, to the nth degree, to an extraordinary degree, and to the utmost. These words can be used to describe anything from emotions such as anger or happiness, to physical conditions such as heat or cold, to actions taken by individuals or groups that are particularly extreme in nature. By using these synonyms, we can truly convey just how extreme something truly is.