| Suffix with Nobel | 17 |
| Suffix with north | 17 |
| Suffix with north or south | 26 |
| Suffix with northeast | 21 |
| Suffix with northwest | 21 |
| Suffix with novel | 17 |
| Suffix with Nu- and Agri- in garden product names | 49 |
| Suffix with oct- | 16 |
| Suffix with octa- | 17 |
| Suffix with odd | 15 |
| Suffix with official | 20 |
| Suffix with official or fan | 27 |
| Suffix with official or legal | 29 |
| Suffix with Oktober | 19 |
| Suffix with Oktober or Ozz | 26 |
| Suffix with old | 15 |
| Suffix with old or gang | 23 |
| Suffix with old or young | 24 |
| Suffix with opal | 16 |
| Suffix with opal or fluor | 25 |
| Suffix with opal or petal | 25 |
| Suffix with oper- | 17 |
| Suffix with opinion | 19 |
| Suffix with orange | 18 |
| Suffix with orange or lemon | 27 |
| Suffix with Oregon | 18 |
| Suffix with organ | 17 |
| Suffix with organ or patriot | 28 |
| Suffix with origin | 18 |
| Suffix with origin or comment | 29 |
| Suffix with Orwell | 18 |
| Suffix with outrage and umbrage | 31 |
| Suffix with ox | 14 |
| Suffix with ox- | 15 |
| Suffix with ox- or sulf- | 24 |
| Suffix with pachy- | 18 |
| Suffix with Paleo- | 18 |
| Suffix with palm | 16 |
| Suffix with pamphlet | 20 |
| Suffix with panel | 17 |
| Suffix with pant | 16 |
| Suffix with pant or aunt | 24 |
| Suffix with parliament | 22 |
| Suffix with part | 16 |
| Suffix with party | 17 |
| Suffix with patriot or manner | 29 |
| Suffix with Paul | 16 |
| Suffix with Paul or Joseph | 26 |
| Suffix with pay | 15 |
| Suffix with pay or play | 23 |
| Suffix with pay or plug | 23 |
| Suffix with pay or schnozz | 26 |
| Suffix with pay or tax | 22 |
| Suffix with peace | 17 |
| Suffix with peck or puck | 24 |
| Suffix with peek or bug | 23 |
| Suffix with Peking | 18 |
| Suffix with pent- | 17 |
| Suffix with penta- | 18 |
| Suffix with penta-, hexa-, hepta-, etc. | 39 |
| Suffix with Pentagon | 20 |
| Suffix with peon or break | 25 |
| Suffix with pept- | 17 |
| Suffix with percent | 19 |
| Suffix with percent or project | 30 |
| Suffix with perform | 19 |
| Suffix with peril | 17 |
| Suffix with peril or vigor | 26 |
| Suffix with period | 18 |
| Suffix with persist | 19 |
| Suffix with personal | 20 |
| Suffix with phenyl | 18 |
| Suffix with phon | 16 |
| Suffix with phon- | 17 |
| Suffix with phosphor | 20 |
| Suffix with photo | 17 |
| Suffix with photo or rheo | 25 |
| Suffix with planet | 18 |
| Suffix with planet or fact | 26 |
| Suffix with planet or meteor | 28 |
| Suffix with play | 16 |
| Suffix with play or plug | 24 |
| Suffix with plug | 16 |
| Suffix with pluto- | 18 |
| Suffix with pod | 15 |
| Suffix with pod- or psych- | 26 |
| Suffix with poet | 16 |
| Suffix with poet or critic | 26 |
| Suffix with poet or hero | 24 |
| Suffix with poison | 18 |
| Suffix with poll or pun | 23 |
| Suffix with polymer | 19 |
| Suffix with pont- | 17 |
| Suffix with pop or cell | 23 |
| Suffix with portrait | 20 |
| Suffix with potent or prudent | 29 |
| Suffix with Power or Gator | 26 |
| Suffix with prank | 17 |
| Suffix with prank or poll | 25 |
| Suffix with prank or trick | 26 |