- respiratory disease
- roseola infantilis
- respiratory illness
- roseola infantum
- respiratory disorder
- regression toward the mean
- republic of cyprus
- rhizopus stolonifer
- reversible process
- richardson ground squirrel
- Red Cross
- rice_grain fritillary
- remind of
- rub it in
- rathskeller
- ready to hand
- republic of chad
- ret
- rhabdomancy
- rematch
- recreational assembly
- red_violet
- reticulocyte
- registered post
- ring mail
- Rocephin
- rommel
- rock harlequin
- Resedaceae
- rockrose family
- raphus cucullatus
- richmondena cardinalis
- regulus calendula
- recurved
- riparia riparia
- ref
- robber fly
- robaxin
- recusal
- ryles tube
- rheiformes
- rhea silvia
- raphicerus campestris
- rapine
- ravenala
- rose campion
- Ribes sativum
- Ribes nigrum
- Ribes sanguineum
- rope_maker