| Alpha Metroid | Alpha Mic | Alpha Michigan Brewing Company |
| Alpha Micro | Alpha Microscopii | Alpha Microsystems |
| Alpha Mike Foxtrot: Rare Tracks 1994 - 2014 | Alpha Mike Foxtrot: Rare Tracks 1994-2014 | Alpha Mike Foxtrot: Rare Tracks 1994–2014 |
| Alpha Mission | Alpha Mission II | Alpha mixing |
| Alpha Monocerotids | Alpha Monocerotis | Alpha MOS |
| Alpha Motherfuckers | Alpha motoneuron | Alpha motoneurons |
| Alpha Motor Corporation | Alpha motor neuron | Alpha motor neurone |
| Alpha motor neurons | Alpha motorneuron | Alpha motorneurons |
| Alpha Motors | Alpha mount | Alpha mount system |
| Alpha mount system (disambiguation) | Alpha Mountain | Alpha movement |
| Alpha MSH | Alpha Mu Alpha | Alpha Mu Gamma |
| Alpha Mu Sigma | Alpha Mulugeta | Alpha Mus |
| Alpha Muscae | Alpha myrcene | Alpha Natural Resources |
| Alpha Natural Resources Inc | Alpha Natural Resources, Inc. | Alpha New Town Bears |
| Alpha Newspaper Group | Alpha Newspapers | Alpha Noir |
| Alpha Noir / Ómega White | Alpha Noir / Omega White | Alpha Noir/Omega White |
| Alpha Normae | Alpha Nu Sigma | Alpha nu sigma |
| Alpha nuclide | Alpha Nyan | Alpha o |
| Alpha O | Alpha Oct | Alpha Octant |
| Alpha Octantis | Alpha of the Plough | Alpha Ojini |
| Alpha olefin | Alpha Omar Konare | Alpha Omar Wann |
| Alpha Omega | Alpha Omega (board game) | Alpha Omega (Cheek album) |
| Alpha Omega (Cro-Mags album) | Alpha Omega (disambiguation) | Alpha Omega (fraternity) |
| Alpha Omega (local) | Alpha Omega Alpha | Alpha Omega Alpha Honor Medical Society |
| Alpha Omega Alpha Medical Honor Society | Alpha Omega Alpha National Honor Society | Alpha Omega Epsilon |
| Alpha omega epsilon | Alpha Omega Fraternity | Alpha Omega Mu |
| Alpha Omicron Pi | Alpha Omicron Sigma | Alpha one |
| Alpha One | Alpha One (comics) | Alpha One (DC Comics) |
| Alpha One (superhero) | Alpha One Airways | Alpha one fetoprotein |
| Alpha one-fetoprotein | Alpha operon ribosome binding site | Alpha Oph |
| Alpha Ophiuchi | Alpha Ori | Alpha Orionis |
| Alpha Oumar Barry | Alpha Oumar Djalo | Alpha Oumar Konaré |
| Alpha Oumar Konare | Alpha Oumar Sow | Alpha Oumar Sow (disambiguation) |
| Alpha Oumar Sow (footballer, born 1984) | Alpha Oumar Sow (footballer, born 1997) | Alpha Oumar Sow (Guinean footballer) |
| Alpha Oumar Sow (Senegalese footballer) | Alpha oxidation | Alpha pair |
| Alpha Papa | Alpha Particle | Alpha particle |
| Alpha particle bug | Alpha particle mass | Alpha particle scattering |
| Alpha particle X-ray spectrometer | Alpha Particle X-Ray Spectrometer | Alpha particle X-Ray spectrometer |
| Alpha Particle X-ray Spectrometer | Alpha particles | Alpha Pav |
| Alpha Pavonis | Alpha Peg | Alpha Pegasi |
| Alpha Per | Alpha Persei | Alpha Persei Cluster |
| Alpha Persei cluster | Alpha Persei moving cluster | Alpha Persei Moving Cluster |
| Alpha Phi | Alpha phi | Alpha Phi Alpha |
| Alpha Phi Alpha Fraternity | Alpha Phi Alpha Fraternity Inc. | Alpha Phi Alpha Fraternity, Inc. |
| Alpha Phi Alpha Fraternity, Incorporated | Alpha Phi Beta | Alpha Phi Beta Fraternity |
| Alpha phi delta | Alpha Phi Delta | Alpha Phi Fraternity House-Beta Alpha Chapter (Champaign, Illinois) |
| Alpha Phi Gamma | Alpha Phi Gamma (disambiguation) | Alpha Phi Gamma (honor society) |
| Alpha Phi Gamma (sorority) | Alpha Phi Omega | Alpha phi omega |
| Alpha Phi Omega (Philippines) | Alpha Phi Omega (Philippines) Chapters and Alumni Associations | Alpha Phi Omega chapters |
| Alpha Phi Omega chapters (chronological) | Alpha Phi Omega chapters (geographical) | Alpha phi omega national conventions |
| Alpha Phi Omega national conventions | Alpha Phi Omega: Epsilon Mu Chapter | Alpha Phi Quarterly |
| Alpha Phi Sigma | Alpha Phi Sigma (medical) | Alpha Phi Sorority House |
| Alpha Phi Sorority House (Eugene, Oregon) | Alpha Phoenicis | Alpha Pi Delta |
| Alpha Pi Delta Sorority, Inc | Alpha Pi Mu | Alpha Pi Omega |
| Alpha Pi Sigma | Alpha Pic | Alpha Pictoris |
| Alpha Pictures | Alpha pinene | Alpha Piscis Austrini |
| Alpha Piscis Austrini C | Alpha Piscium | Alpha Place |
| Alpha pleated sheet | Alpha plot | Alpha Plus |
| Alpha Plus (disambiguation) | Alpha Plus Group | Alpha Polaris |
| Alpha predator | Alpha Prema | Alpha Press |
| Alpha Prime | Alpha Prime (computer game) | Alpha Prime Racing |
| Alpha Primitive | Alpha privative | Alpha privativum |
| Alpha process | Alpha process elements | Alpha processor |
| ALPHA processor | Alpha Profiling | Alpha programming language |
| Alpha Proteobacteria | Alpha proteobacterium | Alpha Protocol |
| Alpha proton X-ray spectrometer | Alpha Proxima | Alpha proxima |
| Alpha PsA | Alpha Psc | Alpha Psi |
| Alpha Psi Lambda | Alpha Psi Omega | Alpha psi omega |
| Alpha Psi Rho | Alpha Punjabi | Alpha Pup |
| Alpha Pup Records | Alpha Pyx | Alpha Pyxidis |
| Alpha Q | Alpha Quadrant | Alpha quality |
| Alpha quartz | Alpha QX1 | Alpha radiation |
| Alpha Radiation | Alpha radication | Alpha Radio |
| Alpha Radio Darlington | Alpha railway station | Alpha railway station, Queensland |
| Alpha Ralpha Boulevard | Alpha Rat's Nest | Alpha ray |
| Alpha Ray | Alpha rays | Alpha reactions |
| Alpha reader | Alpha receptor | Alpha receptors |
| Alpha Records | Alpha Records (company) | Alpha Records (Greek company) |
| Alpha recursion | Alpha recursion theory | Alpha reduction |
| Alpha reflection | Alpha Regio | Alpha release |
| Alpha renaming | Alpha Repertory Television Service | Alpha Ret |
| Alpha Reticuli | Alpha rev | Alpha Rev |
| Alpha Rho Chi | Alpha Rho Chi (ΑΡΧ) | Alpha Rho Chi Fraternity House (Champaign, Illinois) |
| Alpha Rho Upsilon | Alpha rhythm | Alpha Richard Diounkou |
| Alpha Richard Diounkou Tecagne | Alpha Ridge | Alpha Ridge (Alaska) |
| Alpha Ridge Community Park | Alpha Ridge Landfill | Alpha Ridge, Alaska |
| Alpha ring (ring of Uranus) | Alpha risk | Alpha Robin |
| Alpha Roburis Carolii | Alpha roll | Alpha Roll |
| Alpha Romeo | Alpha Ruby | Alpha Rwirangira |
| Alpha Sag | Alpha Saga | Alpha Sagittae |
| Alpha Sagittarii | Alpha Sagittarii in fiction | Alpha santalol |
| Alpha Sapphire | Alpha satellite | Alpha satellite sequence |
| Alpha scale | Alpha Scholars | Alpha School District |
| Alpha Scl | Alpha Sco | Alpha Scorpii |
| Alpha Scorpii A | Alpha Scorpio | Alpha Sct |
| Alpha Sculptoris | Alpha Scuti | Alpha Secondary School |
| Alpha secretase | Alpha selenation | Alpha Ser |
| Alpha Serpentis | Alpha Sextantis | Alpha Sgr |
| Alpha shape | Alpha shapes | Alpha sheet |
| Alpha Shelembe | Alpha sig | Alpha Sigma |