| arrendera | lease |
| arrendera ut | lease |
| arrenderad | leasehold |
| arrendetid | tenancy |
| arrest | custody |
| arrestera | arrest |
| arresterad | under arrest |
| Arrhenius ekvation | Arrhenius equation |
| Arrhinoceratops brachyops | Arrhinoceratops |
| Arrigo Boito | Arrigo Boito |
| arrogans | arrogance |
| arrogant | bumptious |
| Arromanches | Arromanches-les-Bains |
| arrondering | land consolidation |
| Arrow interceptor | Arrow missile |
| arrowrot | arrowroot |
| Ars nova | Ars nova |
| arsel | son of a bitch |
| arsenal | armory |
| Arsenal de Sarandí | Arsenal de Sarandí |
| Arsenal Stadium | Arsenal Stadium |
| Arsenie Toderas | Arsenie Todiraş |
| arsenik | arsenic |
| Arsenik och gamla spetsar | Arsenic and Old Lace |
| Arses | Arses of Persia |
| Arsia Mons | Arsia Mons |
| Arsinoe I | Arsinoe I of Egypt |
| Arsinoe II | Arsinoe II of Egypt |
| Arsinoe III | Arsinoe III of Egypt |
| Arsinoe IV | Arsinoe IV of Egypt |
| arsle | ass |
| Arsène Wenger | Arsène Wenger |
| art | type |
