| aggrade | (verb) build up to a level by depositing sediment | - |
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| biodegrade | (verb) break down naturally through the action of biological agents | - |
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| degrade | (verb) lower the grade of something; reduce its worth | Synonyms: cheapen |
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| (verb) reduce the level of land, as by erosion | - |
| (verb) reduce in worth or character, usually verbally | Synonyms: demean, disgrace, put down, take down |
| downgrade | (verb) rate lower; lower in value or esteem | - |
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| gradate | (verb) pass imperceptibly from one degree, shade, or tone into another | - |
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| (verb) arrange according to grades | - |
| grade | (verb) determine the grade of or assign a grade to | - |
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| (verb) assign a rank or rating to | Synonyms: order, place, range, rank, rate |
| (verb) assign a grade or rank to, according to one's evaluation | Synonyms: mark, score |
| (verb) level to the right gradient | - |
| graduate | (verb) make fine adjustments or divide into marked intervals for optimal measuring | Synonyms: calibrate, fine-tune |
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| (verb) receive an academic degree upon completion of one's studies; completion of a course or training | - |
| (verb) confer an academic degree upon | - |
| retrograde | (verb) get worse or fall back to a previous condition | Synonyms: regress, retrogress |
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| (verb) go back over | Synonyms: hash over, rehash |
| (verb) move back | Synonyms: retreat |
| (verb) move in a direction contrary to the usual one | - |
| (verb) move backward in an orbit, of celestial bodies | - |
| upgrade | (verb) to improve what was old or outdated | - |
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| (verb) give better travel conditions to | - |
| (verb) get better travel conditions | - |
| (verb) rate higher; raise in value or esteem | - |
| (verb) give a promotion to or assign to a higher position | Synonyms: advance, elevate, kick upstairs, promote, raise |