knowledgeable in WordNet English dictionary

1. thoroughly acquainted through study or experience
   "this girl, so intimate with nature"-W.H.Hudson; "knowledgeable about the technique of painting"- Herbert Read
   intimate  knowledgeable  versed 
   
2. highly educated; having extensive information or understanding
   "knowing instructors"; "a knowledgeable critic"; "a knowledgeable audience"
   knowing  knowledgeable  learned  lettered  well-educated  well-read 
   
3. alert and fully informed
   "a knowing collector of rare books"; "surprisingly knowledgeable about what was going on"
   knowledgeable  knowing 
   

knowledgeable in English Wiktionary