| compel | (verb) force somebody to do something | Synonyms: obligate, oblige |
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| (verb) necessitate or exact | - |
| compelling | (adjective) tending to persuade by forcefulness of argument | - |
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| (adjective) driving or forcing | - |
| impel | (verb) cause to move forward with force | Synonyms: propel |
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| (verb) urge or force (a person) to an action; constrain or motivate | Synonyms: force |
| impelled | (adjective) urged or forced to action through moral pressure | Synonyms: driven |
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| impellent | (adjective) forcing forward or onward; impelling | - |
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| impeller | (noun) the blade of a rotor (as in the compressor of a jet engine) | - |
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| impelling | (adjective) markedly effective as if by emotional pressure | - |
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