rancher
hustler
Neither.
rhenium
spanner
A seven letter word starting with R and ending with O is risotto.
The obvious word is "stellar." The transposition is "staller."
erosion, terrain, therein, Alderon, western
one word is creeper, but that's not really a word, it's more of a name...sorry <:(
Try favorite or fluoride.
Scarbeardearfeargearhearnearpearrearseartearwearyear.
The three-letter word for scull is "oar."