What are some eight letter words with 2nd letter R and 7th letter R and 8th letter N?

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 4 words with the pattern -R----RN. That is, eight letter words with 2nd letter R and 7th letter R and 8th letter N. In alphabetical order, they are:

crumhorn

freeborn

krumhorn

trueborn