Yes, stropper is a word, common, singular noun; a word for a person or a mechanical device that strops (to sharpen a blade with a belt or strap).

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 6 words with the pattern --RO-P--. That is, eight letter words with 3rd letter R and 4th letter O and 6th letter P. In alphabetical order, they are:

garoupas

scrooped

stropped

stropper

stroupan

thropple

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 2 words with the pattern --ROP--R. That is, eight letter words with 3rd letter R and 4th letter O and 5th letter P and 8th letter R. In alphabetical order, they are:

horopter

stropper

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 3 words with the pattern S--O-PE-. That is, eight letter words with 1st letter S and 4th letter O and 6th letter P and 7th letter E. In alphabetical order, they are:

scrooped

stropped

stropper

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 6 words with the pattern -TR-PP--. That is, eight letter words with 2nd letter T and 3rd letter R and 5th letter P and 6th letter P. In alphabetical order, they are:

strapped

strapper

stripped

stripper

stropped

stropper