twelve
Alkali.
racecar
squawkstreak
Six letter words that start and end with R:rafterraiderrancorrangerrapierraptorrasherratherreaderreaperrectorreeferrenderrenterrepairricherrigourringerripperrobberrockerrollerromperrooferrosterrubberrudderrunner
embalmemblemesteem
bamboo
talenttyrantteapottickettrivettenant
forsho
baobab.
Raiden
zealot
A symbol used for counting is a "number." Perhaps the "d" is incorrect.