| A | B |
| role | the character played by an actor or actress |
| section | any part of a whole; portion |
| sector | an identifiable segment or part of a landscape, area, society, political system; zone |
| significant | having consequence or import; important |
| similar | having resemblance or likeness |
| source | the origin or cause of something; root |
| specific | pertaining explicitly to a particular thing or person; precise, or definite |
| structure | a thing consisting of a number of elements joined together in a certain way |
| theory | a proposed explanation of something, usu. based on abstract reasoning |
| variable | likely to change; not constant; inconsistent |