| Participates in a marathon | 26 |
| Participates in a medley | 24 |
| Participates in a pond activity | 31 |
| Participates in a press conference | 34 |
| Participates in a regatta, perhaps | 34 |
| Participates in a vigil, maybe | 30 |
| Participates in an auction | 26 |
| Participates in decision-making | 31 |
| Participates in domestic life | 29 |
| Participates in forensics | 25 |
| Participates in some Halloween mischief | 39 |
| Participates in the Hambletonian | 32 |
| Participates in the Super G | 27 |
| Participates in the Tour de France | 34 |
| Participates, with "in" | 33 |
| Participating | 13 |
| Participating in a 401(k) | 25 |
| Participating in a December chore | 33 |
| Participating in a freedom march, e.g. | 38 |
| Participating in a group | 24 |
| Participating in a yacht race | 29 |
| Participating in the America's Cup | 38 |
| Participating in the Indy 500 | 29 |
| Participating in the rat race | 29 |
| Participation criterion | 23 |
| Participation declaration | 25 |
| Participators | 13 |
| Participatory | 13 |
| Participial ending | 18 |
| Participial endings | 19 |
| Participial suffix | 18 |
| Participle ending | 17 |
| Participle former | 17 |
| Participle suffix | 17 |
| Participle, at times | 20 |
| Participles, sometimes | 22 |
| Particle | 8 |
| Particle accelerator | 20 |
| Particle accelerator by-product | 31 |
| Particle accelerator particle | 29 |
| Particle accelerator particles | 30 |
| Particle accelerator, e.g. | 26 |
| Particle accelerators, atomwise | 31 |
| Particle Ani DiFranco sings about | 33 |
| Particle composed of three quarks | 33 |
| Particle containing a quark | 27 |
| Particle created by a cosmic ray | 32 |
| Particle depicted on an Emmy | 28 |
| Particle detector co-creator | 28 |
| Particle displacement symbols, in physics | 41 |
| Particle ejected from an atom during ionization | 47 |
| Particle emitted by a quark | 27 |
| Particle flux density symbols | 29 |
| Particle for a physicist | 24 |
| Particle for Bohr | 17 |
| Particle in a cathode ray tube | 30 |
| Particle in a chamber | 21 |
| Particle in a charged state | 27 |
| Particle in a cloud chamber | 27 |
| Particle in a cyclotron | 23 |
| Particle in a cyclotron: Abbr. | 30 |
| Particle in a packet | 20 |
| Particle in a quark model | 25 |
| Particle in a salt solution | 27 |
| Particle in an atomic nucleus | 29 |
| Particle in an hourglass | 24 |
| Particle in electrolysis | 24 |
| Particle made of quark-antiquark pairs | 38 |
| Particle made of quarks | 23 |
| Particle name coined by Enrico Fermi | 36 |
| Particle named for a letter of the alphabet | 43 |
| Particle of a dwindling campfire | 32 |
| Particle of cosmic radiation | 28 |
| Particle of dust | 16 |
| Particle of light | 17 |
| Particle of soot | 16 |
| Particle physicist whose findings were first accepted by Einstein, but later were shown to be fraudulent | 104 |
| Particle physicist's particle | 33 |
| Particle physicist's particles | 34 |
| Particle physicist's s, p, d, or f | 38 |
| Particle physics particle | 25 |
| Particle physics subject | 24 |
| Particle stream | 15 |
| Particle stream, in physics | 27 |
| Particle streams | 16 |
| Particle suffix | 15 |
| Particle suffix, in physics | 27 |
| Particle that causes secondary ionization | 41 |
| Particle that may bond | 22 |
| Particle that's emitted | 27 |
| Particle that's got a charge | 32 |
| Particle theorized in 1977 | 26 |
| Particle theory | 15 |
| Particle with a "flavor" | 34 |
| Particle with a charge | 22 |
| Particle with no electric charge | 32 |
| Particle with six flavors | 25 |
| Particle, in Scotland | 21 |
| Particle-detecting device | 25 |
| Particle: Abbr. | 15 |