Quote:
Originally Posted by eggsinfinitum
Grammar, not spelling-wise: Impact is a noun! It really bothers me when people use "impacted" or "impactful" which are just not words, but you see them used more and more frequently.
I am in the medical field, believe me--you do NOT want to be impacted! 
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"impacted" can be an adjective, such as an "impacted tooth". A lot of words can change part of speech depending on ending. For example, "book" is a noun, while "bookish" is an adjective, "booked" is a verb. Sorry.....it's not very often I can "play teacher" anymore.