1) Abreast 2) Advised 3) Apprised 4) Aufait 5) Aware 6) Conversant 7) Educated 8) Hep 9) Hip 10) Knowing 11) Notified 12) Posted 13) Sophisticated 14) Told 15) Wellread 1) Abreast of 2) Advised 3) Au courant 4) Au fait 5) Aware 6) Conversant 7) Educated 8) Enlightened 9) Familiar 10) Hip to 11) In the know 12) Knowing 13) Knowledgeable 14) Privy 15) Sophisticated 16) Up on 17) Well-read 18) Wise 19) Wise to 
• (a.) Unformed or ill-formed; deformed; shapeless. • (imp. & p. p.) of Inform
In·formed' adjective Unformed or ill-formed; deformed; shapeless. [ Obsolete] Spenser. Informed stars . 
[adj] - having much knowledge or education
adjective having much knowledge or education; `an informed public`; `informed opinion`; `the informed customer`
having or prepared with information or knowledge; apprised: an informed audience that asked intelligent questions.