What are some nine letter words with 1st letter A and 4th letter O and 6th letter E and 8th letter U?

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 2 words with the pattern A--O-E-U-. That is, nine letter words with 1st letter A and 4th letter O and 6th letter E and 8th letter U. In alphabetical order, they are:

arboreous
arboretum