CO- is an extremely productive prefix meaning "together" or "with": COME, COULD, COUNT, COVER, COUNTRY, COPY, CONTROL, COMPLEX, CONNECT, CONCERN, and CONFLICT. CO- words represent some of the most common vocabulary in English.
COZY (16 pts) and COXSWAIN are strong CO plays. COMBO (9 pts) and COMET (9 pts) are solid 5-letter options. COWL (9 pts) and COUP (8 pts) are excellent short plays. CO- bingos like COMFORT and CONFIRM are valuable.
High-value word starts for Scrabble, Wordle, and crosswords