| Part of P.S. | 12 |
| Part of P.R. | 12 |
| Part of p.p.d.o. | 16 |
| Part of P.O.W. | 14 |
| Part of P.O. or P.S. | 20 |
| Part of P.M. | 12 |
| Part of P.G.A.: Abbr. | 21 |
| Part of P.E.I.: Abbr. | 21 |
| Part of P.D.A.: Abbr. | 21 |
| Part of OWN | 11 |
| Part of overhead | 16 |
| Part of overalls | 16 |
| Part of OTC | 11 |
| Part of OTB | 11 |
| Part of OT | 10 |
| Part of OSHA | 12 |
| Part of OS: abbr. | 17 |
| Part of Orville's machine? | 30 |
| Part of ORU | 11 |
| Part of Orion's left leg | 28 |
| Part of Orion's belt | 24 |
| Part of Orion | 13 |
| Part of Orange County, Calif. | 29 |
| Part of OPEC (abbr.) | 20 |
| Part of op. cit. | 16 |
| Part of OOO | 11 |
| Part of Ontario's southern border | 37 |
| Part of one's sole | 22 |
| Part of one's inheritance? | 30 |
| Part of one's inheritance | 29 |
| Part of OMG | 11 |
| Part of Old World: Abbr. | 24 |
| Part of old San Francisco | 25 |
| Part of Old Glory | 17 |
| Part of old French Indochina | 28 |
| Part of old English refrain | 27 |
| Part of old discotheque names | 29 |
| Part of Ohio's border | 25 |
| Part of OED (abbr.) | 19 |
| Part of OED | 11 |
| Part of Oceania | 15 |
| Part of OBP | 11 |
| Part of OBO | 11 |
| Part of OBL | 11 |
| Part of Obi-Wan Kenobi's costume | 36 |
| Part of OAS: abbr. | 18 |
| Part of OAS | 11 |
| Part of O.T. | 12 |
| Part of O.S.U. or M.S.U. | 24 |
| Part of O.R.U. | 14 |
| Part of O.P.A. | 14 |
| Part of O.N.I.: Abbr. | 21 |
| Part of O.H.M.S. | 16 |
| Part of O.E.D. | 14 |
| Part of o.d. | 12 |
| Part of O.A.S.: Abbr. | 21 |
| Part of O.A.S. | 14 |
| Part of O'Neill title | 25 |
| Part of NYU | 11 |
| Part of NYSE: Abbr. | 19 |
| Part of NYSE | 12 |
| Part of NYPD: Abbr. | 19 |
| Part of NYPD | 12 |
| Part of NYE | 11 |
| Part of NYC | 11 |
| Part of NSW | 11 |
| Part of NSFW | 12 |
| Part of NSAID | 13 |
| Part of NRC | 11 |
| Part of NRA: Abbr. | 18 |
| Part of NRA (abbr.) | 19 |
| Part of NRA | 11 |
| Part of NPR | 11 |
| Part of NOW: Abbr. | 18 |
| Part of NOW | 11 |
| Part of Notre Dame | 18 |
| Part of Norway's landscape | 30 |
| Part of Northwest Territory | 27 |
| Part of North Amer. | 19 |
| Part of NNW | 11 |
| Part of NNE | 11 |
| Part of NL | 10 |
| Part of NIMH | 12 |
| Part of NIMBY | 13 |
| Part of NIH: Abbr. | 18 |
| Part of NHL | 11 |
| Part of NFL | 11 |
| Part of NFC: Abbr. | 18 |
| Part of newlyweds' monthly budget | 37 |
| Part of New York south of Connecticut | 37 |
| Part of New York or Los Angeles | 31 |
| Part of New York City (abbr.) | 29 |
| Part of New York | 16 |
| Part of New Orleans is below it | 31 |
| Part of New Hampshire's motto | 33 |
| Part of New England | 19 |
| Part of New Eng. | 16 |
| Part of NEA: Abbr. | 18 |
| Part of NEA | 11 |
| Part of NE | 10 |