| A | B |
| festivity | A joyous feast, holiday, or celebration. |
| festoon | A string of flowers suspended in a curve or between two points. |
| festal | Relating to or in the nature of a feast or festival. |
| radical | Arising from or going to a root or source. |
| radicle | The part of a plant that develops into a root. |
| radix | A root or point of origin. The base of a system or numbers. |
| ramus | A branch, as of a plant or nerve. |
| ramification | A consequence growing out of and sometimes complicating a plan. |
| ramada | A trellis over a walkway, onto which climbing plants are trained. |
| legal | Relating to or concerned with the law. |
| legitimate | Being in compliance with the law; legal. |
| legislator | One that creates or enacts laws. |
| claustrophobia | An abnormal fear of being in narrow or enclosed spaces. |
| closure | The act of closing or the state of being closed. |
| cluster | A group of the same lements gathered or occurring closely together. |
| ergograph | A device for measuring the work capacity of a muscle or muscle group. |
| ergonomics | The science of designing equipment to maximize productivity. |
| ergometer | An instrument for measuring the amount of work actually done by a muscle or muscle group. |