| Hyponyms | Length | Vowels | Syllables | |
|---|---|---|---|---|
| Area Code | 9 | 4 | 5 | 3 |
| Bar Code | 8 | 5 | 3 | 2 |
| Cipher | 6 | 4 | 2 | 2 |
| Color Code | 10 | 6 | 4 | 3 |
| Cryptograph | 11 | 9 | 2 | 3 |
| Cypher | 6 | 5 | 1 | 2 |
| International Morse Code | 24 | 14 | 10 | 8 |
| Morse | 5 | 3 | 2 | 1 |
| Morse Code | 10 | 6 | 4 | 3 |
| Postal Code | 11 | 7 | 4 | 3 |
| Postcode | 8 | 5 | 3 | 2 |
| Secret Code | 11 | 7 | 4 | 3 |
| Universal Product Code | 22 | 14 | 8 | 7 |
| Zip Code | 8 | 5 | 3 | 2 |

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