| reliable(adjective, knowledgeable, aware, informed, savvy) |
| scholastic(adjective, knowledgeable, intellectual, cultured, learned) |
| sciential(adjective, knowledge, experience, skill, expert) |
| scientific(familiar, knowledgeable, informed, experienced, cultured) |
| seasoned(familiar, knowledgeable, informed) |
| shrewd |
| solemn(knowledgeable, cultured, educated, erudite, enlightened) |
| solid(knowledgeable, cultured, educated, erudite, enlightened) |
| sound(knowledgeable, cultured, educated, erudite, enlightened) |
| streetwise |
| strong in |
| studied(knowledgeable, cultured, educated, erudite, enlightened) |
| taught(familiar, knowledgeable, informed, intellectual, experienced) |
| tuned in(expression, adjective, knowledgeable, aware, informed) |
| up(knowledgeable, aware, informed, learned, well-informed) |
| up-to-date(adjective, knowledgeable, aware, informed, learned) |
| versant(knowledgeable, aware, informed, learned, well-informed) |
| well-posted |
| well-read in |
| well informed(adjective, knowledge, experience, skill, expert) |