O starts many short, essential words used as Scrabble hooks: OX, OD, OM, and ON. Longer O words like OMNIBUS and OUTSHINE are useful in crosswords.
OX (9 pts) is one of the best two-letter O plays. OOZE (13 pts) and OXBOW (17 pts) are strong medium-length O words.
High-value word starts for Scrabble, Wordle, and crosswords