| Synonyms | Length | Vowels | Syllables | |
|---|---|---|---|---|
| Generator | 9 | 5 | 4 | 4 |
| Gismo | 5 | 3 | 2 | 3 |
| Gizmo | 5 | 3 | 2 | 2 |
| Hot Air Engine | 14 | 8 | 6 | 4 |
| Howitzer | 8 | 5 | 3 | 3 |
| Hydraulic Engine | 16 | 10 | 6 | 5 |
| Hydro Jet | 9 | 7 | 2 | 3 |
| Impulse Duct Engine | 19 | 12 | 7 | 6 |
| Inverted Engine | 15 | 9 | 6 | 5 |
| Ion Engine | 10 | 5 | 5 | 3 |
| Ion Rocket | 10 | 6 | 4 | 3 |
| Jet | 3 | 2 | 1 | 1 |
| Lathe | 5 | 3 | 2 | 1 |
| Locomotion | 10 | 5 | 5 | 4 |
| Locomotive | 10 | 5 | 5 | 4 |
| Locomotive Engine | 17 | 9 | 8 | 6 |
| Machine | 7 | 4 | 3 | 2 |
| Machinery | 9 | 6 | 3 | 4 |
| Mechanical Aid | 14 | 8 | 6 | 5 |
| Mechanical Device | 17 | 10 | 7 | 6 |
| Mechanics | 9 | 6 | 3 | 3 |
| Mechanism | 9 | 6 | 3 | 4 |
| Melting Pot | 11 | 8 | 3 | 3 |
| Mend | 4 | 3 | 1 | 1 |
| Mending | 7 | 5 | 2 | 2 |
| Mortar | 6 | 4 | 2 | 2 |
| Motive Power | 12 | 7 | 5 | 5 |
| Motivity | 8 | 5 | 3 | 4 |
| Motor | 5 | 3 | 2 | 2 |
| Motorcar | 8 | 5 | 3 | 3 |
| Otto Engine | 11 | 6 | 5 | 3 |
| Outboard | 8 | 4 | 4 | 2 |
| Outboard Motor | 14 | 8 | 6 | 4 |
| Pancake Engine | 14 | 8 | 6 | 4 |
| Piston | 6 | 4 | 2 | 2 |

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