An adjustable chair is a versatile piece of furniture that can be customized to suit a variety of needs. If you're on the lookout for synonyms for this type of chair, you might consider terms like "reclining chair," "tilting chair," "modular chair," or "adaptive chair."
A reclining chair allows you to adjust the backrest angle to your liking, giving you a comfortable sitting experience. A tilting chair, on the other hand, features a mechanism that allows you to tilt the entire seat, making it easier to get up or sit down.
A modular chair is one that can be rearranged and customized to fit different uses and spaces. And an adaptive chair can be customized to fit the specific needs of an individual, whether it be for ergonomic support or accessibility.