rock
RoundRafterRunnerRinkRealRenderRottenRankRooster
The first noun in your sentence is 'letter', ending in 'r'.
Some household items starting with the letter R are:refrigeratorrange
quarter
A six letter word for a bird of prey starting with the letter R is "raptor."
The collective noun starting with 're' is a regiment of soldiers.
ran, run, rat, rot, rue, raw, rid, rim, rod, Ron (Proper noun)
forgivenessfreedomfear
We find rabbits in our garden. They begin with the letter R.
Rwanda is a country. It begins with the letter R.
me
Robots.