"compulsive" in the noun sense
1. compulsive
a person with a compulsive disposition someone who feels compelled to do certain things
"compulsive" in the adjective sense
1. compulsive
caused by or suggestive of psychological compulsion
"compulsive drinking"
2. compulsive, determined, driven
strongly motivated to succeed
Source: WordNet® (An amazing lexical database of English)
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