- ramadan— the ninth month of the muslim year which is traditionally a month of day_long fasts
- rima vestibuli
- rebuild
- replating
- ro ro
- roll on roll off
- rhythmless
- recharge batteries
- resolution error
- retinal oedema
- retinal migraine
- rattus norvergicus
- recruited
- raw sienna
- retrovirus
- reticulospinal tract
- reticuloendotheliomatosis
- rock bottom
- rugose
- rattle along
- rearmost
- reprocess
- roll tube method
- reliably
- responsibly
- reliableness
- ridgepole
- rights of others
- reproved out of countenance
- ravings
- rendering
- remijia pendunculata remedy
- rontgen
- related to
- rounding process
- repressed
- rhisus sardonicus facies
- ruminatively
- reflectively
- reticulo_olivary tract
- round the corner
- registered nurse
- roughage
- retro_caval ureter
- rendered insensitive
- reveille
- rotational position sensor
- repressively
- recreation room
- revivalistic