One who furthers something, or helps in achieving an aim.(noun)
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Use "furtherer" in a sentence
"Batman decides to investigate the matter furtherer and there he has his first meet with the cat burglar."
"The impropriety of a relation or a friend as a subscriber to or a furtherer of an object of national feeling, of a national tribute, I feel so strongly, that I am afraid thousands of others will feel the same."
"All of the heavy rain is now pushed furtherer to the east but we still have a severe thunderstorm watch in effect for the Dallas area and also to the east where that squall line is so heavy."