No. There are at least 29,302 words in the English language that have eight letters.
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 2 words with the pattern D-N---U-. That is, eight letter words with 1st letter D and 3rd letter N and 7th letter U. In alphabetical order, they are: denarius dinosaur
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern --N--AUR. That is, eight letter words with 3rd letter N and 6th letter A and 7th letter U and 8th letter R. In alphabetical order, they are: dinosaur
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 4 words with the pattern -IN-SA--. That is, eight letter words with 2nd letter I and 3rd letter N and 5th letter S and 6th letter A. In alphabetical order, they are: dinosaur pinesaps windsail winesaps
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern D-N-SA--. That is, eight letter words with 1st letter D and 3rd letter N and 5th letter S and 6th letter A. In alphabetical order, they are: dinosaur
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern D-NOS---. That is, eight letter words with 1st letter D and 3rd letter N and 4th letter O and 5th letter S. In alphabetical order, they are: dinosaur
Eight letter words for desire
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 4 words with the pattern DI--S--R. That is, eight letter words with 1st letter D and 2nd letter I and 5th letter S and 8th letter R. In alphabetical order, they are: digester digestor dinosaur disaster
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern -HEC---G. That is, eight letter words with 2nd letter H and 3rd letter E and 4th letter C and 8th letter G. In alphabetical order, they are: checking
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern D--OSA-R. That is, eight letter words with 1st letter D and 4th letter O and 5th letter S and 6th letter A and 8th letter R. In alphabetical order, they are: dinosaur
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 4 words with the pattern CH-C---G. That is, eight letter words with 1st letter C and 2nd letter H and 4th letter C and 8th letter G. In alphabetical order, they are: chacking checking chocking chucking
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 3 words with the pattern -HE-KI-G. That is, eight letter words with 2nd letter H and 3rd letter E and 5th letter K and 6th letter I and 8th letter G. In alphabetical order, they are: checking cheeking theeking
Yes, eight letter words ending with 'r' are: # bandster # bangster # banisher # banister # canaster # canister # dinosaur # finesser # finisher # gangster # ganister # gongster # honester # lingster # linkster # longspur # minister # pinaster # punisher # ringster # sandspur # sinister # songster # tongster # vanisher Thank You!! :)