Angiotensin-converting enzyme inhibitor is a mouthful to say, and can be a bit of a tongue twister for even the most experienced medical professionals. Fortunately, there are a number of synonyms for this term that are easier to pronounce and remember. Some of these include ACE inhibitors, angiotensin blockers, and renin-angiotensin system inhibitors. These terms refer to medications that work to lower blood pressure by blocking the action of angiotensin-converting enzyme in the body. Regardless of what they're called, these drugs are an important tool for managing hypertension and preventing serious cardiovascular complications.