| National | 381. NA-CIO-NAL
|
| Natural | 382. NA-TU-RAL
|
| Nautical | 383. NÁU-TI-CO, CA
|
| Navigate | 384. NA-VE-GAR
|
Negative | 385. NE-GA-TI-VO, VA
|
| Negotiate | 386. NE-GO-CIAR
|
| Normal | 387. NOR-MAL
|
| Nostalgic | 388. NOS-TÁL-GI-CO, CA
|
| Notice | 389. NO-TI-CIA
|
| Nutritive | 390. NU-TRI-TI-VO, VA
|
Objective | 391. OB-JE-TI-VO
|
| Obligate | 392. O-BLI-GAR
|
| Occupation | 393. O-CU-PA-CIÓN
|
| Ocean | 394. O-CÉ-A-NO
|
| Olympic | 395. O-LÍM-PI-CO, CA
|
| Operation | 396. O-PE-RA-CIÓN
|
| Organ | 397. ÓR-GA-NO
|
| Origin | 398. O-RI-GEN
|
| Oxygen | 399. O-XÍ-GE-NO
|
| Panic | 400. PÁ-NI-CO
|