Axile refers to something pertaining to or in the axis. Synonyms for axile include axial, centric, central, core, polar, and hub. These words can all describe something that is at the center of something else or is integral to its function. For example, the axial plane is the plane perpendicular to the axis of symmetry and divides it into mirror-image halves. The centric position is the position at the center of an object or system. The central idea is the main or most important idea in a piece of writing or conversation. Using synonyms can help to expand your vocabulary and make your writing or speech more varied and interesting.