Words Starting with CO in Scrabble
CO ranks among the top three most productive two-letter prefixes in Scrabble, alongside DE and RE. With over 1,200 valid words, CO- combinations appear in nearly every game — from short power plays like COX (12pts) and COZ (14pts) to devastating bingo words like COMPUTE and COMPLEX. This guide covers the best CO words for competitive scoring, focusing on short high-value plays and bingo-length opportunities.
1,200+
Valid CO Words
20
Highest Base Score
11
Avg Score (7-letter)
3–15
Letter Range
🏆 Best for Bingos
COMPUTE (7) · COMPLEX (7) · CONFORM (7) · CONVERT (7) · COMPOSE (7)
⚡ Highest Scoring
COXCOMB (20) · COZY (18) · COMPLEX (20) · CONJUX (22) · CONVEX (18)
📝 Most Common
COMBINE · COMMAND · COMPANY · COMPARE · COMPLETE · CONFIRM · CONNECT · CONTAIN
🎯 Easy to Build
COB · COD · COG · CON · COP · COT · COW · COX · COY · COZ · COAT · CODE · COIN · COLD
CO Words by Length (3–5 Letters)
Short CO words are absolute workhorses in Scrabble. The 3-letter CO words are especially valuable — they fit anywhere on the board and many contain high-scoring letters like X, Z, and W. Memorize these for tight positions and parallel plays.
3 Letters (Power Plays)
COX (12) · COZ (14) · COW (8) · COY (8) · COB (7) · COP (7) · COD (6) · COG (6) · CON (5) · COT (5) · COO (5)
4–5 Letters
COZY (18) · COPY (11) · COAX (13) · COOK (10) · COLD (7) · COME (8) · CORD (7) · CORE (6) · CORK (10) · CORN (6) · COVER (10) · COXED (15)
💡 Key Insight
CO has 14 valid 3-letter words — more than almost any other two-letter start. This makes it invaluable for tight board positions where only 3 letters fit. COX (12pts) and COZ (14pts) are among the highest-scoring 3-letter words in the entire game.
CO Words (6 Letters)
Six-letter CO words bridge the gap between short plays and bingos. They score well on their own and can be extended with S plurals or other suffixes to reach bingo length on your next turn.
6 Letters (Best Picks)
CONVEX (18) · COMBAT (12) · COMPLY (15) · CONVEY (14) · COPIED (11) · CORNER (8) · COSTLY (11) · COUPLE (10) · COWARD (12) · COYOTE (11)
Bingo-Length CO Words (7 Letters)
Seven-letter CO bingos are highly accessible because the prefix only uses 2 tiles. You have 5 full tiles for the root word — and with CO being so productive, the chances of landing a bingo are excellent when you hold C and O together.
7-Letter Bingos (High Value)
COMPLEX (20+50) · COMPUTE (13+50) · CONVOKE (16+50) · COWBOYS (17+50) · COMPACT (15+50)
7-Letter Bingos (Common)
COMMAND (14+50) · COMBINE (13+50) · COMMENT (13+50) · COMPANY (16+50) · COMPARE (13+50) · COMPOSE (13+50) · CONCERT (11+50) · CONFIRM (14+50) · CONNECT (11+50) · CONSENT (9+50) · CONTACT (11+50) · CONTAIN (9+50) · CONTENT (9+50) · CONTROL (9+50) · CONVERT (12+50) · CORRECT (11+50) · COUNCIL (11+50) · COUNTRY (12+50) · COURAGE (10+50)
CO Words (8+ Letters)
Eight-letter and longer CO words are mostly played as extensions of existing board words. Adding CO before OPERATE makes COOPERATE. These extension opportunities are nearly endless with such a productive prefix.
8–9 Letters
COEXISTS · COINCIDE · COLLAPSE · COLORFUL · COMBINED · COMEBACK · COMMENCE · COMMERCE · COMMUNAL · COMPETED · COMPOSED · COMPUTED · CONCRETE · CONFINED · CONFLICT · CONFUSED · CONGRESS · CONJURED · CONQUEST · COOKBOOK
10+ Letters
COMBUSTION · COMMENTARY · COMMITMENT · COMPANIONS · COMPARISON · COMPELLING · COMPENSATE · COMPETITOR · COMPLEXITY · COMPREHEND · COMPROMISE · CONFESSION · CONFIDENCE · CONFRONTED · CONTROLLED · CONVENIENT · CONVERSION · CONVICTION · COORDINATE
Strategy: Short CO Words for Premium Squares
CO's real power lies in its short, high-scoring words. Unlike UNDER or TRANS which need long plays to shine, CO dominates in tight board positions where 3–5 letter words hit premium squares perfectly.
COX and COZ on premium squares: COX (12pts) on a Triple Letter X = 30pts for 3 tiles. COZ (14pts) on a Double Word = 28pts. These tiny words punch far above their weight when positioned correctly. Always check if CO+premium letter can reach a bonus square.
COZY is a stealth weapon: At 18 points base, COZY is one of the highest-scoring 4-letter words in Scrabble. On a DW square it scores 36; on TW it hits 54. The Z on a TL within COZY gives you exceptional value for just 4 tiles placed.
Parallel play with CO- words: Play a 3-letter CO word parallel to an existing word, forming multiple 2-letter cross-words. CON next to an existing word can form 3 cross-words simultaneously — each one scoring independently. This multiplies your total score dramatically.
Set up bingo extensions: Play COMP, CONV, or CONF as 4-letter plays now — then extend to COMPUTE, CONVERT, or CONFIRM on your next turn for the bingo bonus. Your opponent often cannot block a front-extension because they do not know which word you are building toward.
CO vs DE: Which Prefix Wins?
Both CO and DE are two-letter prefixes with enormous word counts. Here is how they stack up for competitive play.
✓ CO Advantages
More high-scoring 3-letter words (COX, COZ, COW, COY). Better access to X and Z tiles. 14 valid 3-letter words. COZY is one of the best 4-letter plays in the game.
✗ CO Drawbacks
CO is not valid standalone (DE is in SOWPODS). C tile is worth 3pts but appears less frequently (2 per bag). Fewer front-hook opportunities than DE. Requires C which is a medium-frequency tile.
⚠️ Dictionary Note
CO is not valid as a standalone word in either TWL or SOWPODS. The minimum play is 3 letters (COB, COD, COG, etc.). However, CO- appears as a hyphenated prefix in many dictionaries — only the unhyphenated compound forms are valid in Scrabble.
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