| vertical(noun, adjective, smooth, sharp, solid) |
| erect(verb, adjective, smooth, sharp, solid) |
| steep(adjective, sharp, course, extreme, straight) |
| upright(noun, adjective, adverb, smooth, solid) |
| plumb(adjective, smooth, solid, short, straight) |
| straight(adjective, direct, right, level, straight) |
| orthogonal(adjective, verticality, perpendicularity) |
| sheer(adjective, smooth, sharp, solid, level) |
| precipitous(adjective, smooth, sharp, solid, level) |
| normal(adjective, verticality) |
| horizontal(adjective, rectilinear) |
| up-and-down(adjective, upright, variable, steep, vertical) |
| standing(verb, adjective, firm, straight, upright) |
| abrupt(adjective, sharp, course, quick, upright) |
| stand-up(adjective, straight, upright, erect, vertical) |
| even(adverb, rectilinear) |
| rectangular(verticality, perpendicularity) |
| upstanding(adjective, firm, straight, upright, erect) |
| diagonal |
| right |