phlip@charlemagne:~$ grep -Ei '^r[a-df-z]{10}$' /usr/share/dict/words
Ramakrishna
Rastafarian
Romanticism
Rosicrucian
radiologist
ragamuffins
railroading
rancorously
randomizing
rapaciously
rapscallion
rationalism
rationalist
rationality
ravishingly
ritualistic
robocalling
romanticism
romanticist
roundabouts
roustabouts
routinizing
ruminations