Some seven letter words that end with 'oon' are:
maroon
monsoon, pontoon, cartoon, eftsoon, Kowloon
Cartoon Moon Noon Soon Platoon Spoon
baboon
booncoonloonnoonmoonsoon
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 2 words with the pattern -OON-I-. That is, seven letter words with 2nd letter O and 3rd letter O and 4th letter N and 6th letter I. In alphabetical order, they are: coontie moonlit
Two- Ball Oon.
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern -P--OON. That is, seven letter words with 2nd letter P and 5th letter O and 6th letter O and 7th letter N. In alphabetical order, they are: epizoon
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern F---OON. That is, seven letter words with 1st letter F and 5th letter O and 6th letter O and 7th letter N. In alphabetical order, they are: festoon
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern H--OON-. That is, seven letter words with 1st letter H and 4th letter O and 5th letter O and 6th letter N. In alphabetical order, they are: heroons
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern -O-OON-. That is, seven letter words with 2nd letter O and 4th letter O and 5th letter O and 6th letter N. In alphabetical order, they are: cocoons
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern H---OON. That is, seven letter words with 1st letter H and 5th letter O and 6th letter O and 7th letter N. In alphabetical order, they are: harpoon