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9-Letter Words Starting With COS

  • 31 words
  • All English dictionaries
  • Scrabble points
Dictionary

Popular 9-Letter Words Starting With COS

The most familiar words on this list, with their Scrabble scores.

All 9-Letter Words Starting With COS 31 words

How common is COS at the start of nine-letter words?

Our combined English word list has 31 nine-letter words that start with COS. They average 14.1 points, the best is COSMOLOGY (17 points) and 22.6% end in S.

Total words
31
Average Scrabble score
14.1
out of 17 max
Everyday words
16%
common in ordinary English
Most common ending
S
22.6% of words

Most common last letters

  • s 22.6%
  • y 19.4%
  • g 12.9%

Top vowel pairs

  • ie9.7%
  • ei6.5%
  • au3.2%

Share of words where these two vowels sit side by side.

Rare words worth knowing

Valid in this dictionary but rarely seen in everyday English.

Highest-scoring nine-letter word that starts with COS

c 3o 1s 1m 3o 1l 1o 1g 2y 4

C 3 + O 1 + S 1 + M 3 + O 1 + L 1 + O 1 + G 2 + Y 4 = 17 points

Double word
34 pts
Triple word
51 pts

Face value of the tiles, then the whole word on a double- or triple-word square (letter bonuses and bingos not included).

cosmology

  1. nounthe metaphysical study of the origin and nature of the universe
  2. nounthe branch of astrophysics that studies the origin and evolution and structure of the universe
  • Scrabble US
  • Scrabble UK
  • Words With Friends

Runners-up

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9-letter words starting with…

abcdefghijklmnopqrstuvwxyz

Words starting with COS by length

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Playing words that start with COS

9-Letter Words Starting With COS by the numbers

9-Letter Words Starting With COS FAQ

How many nine-letter words that start with COS are there?

There are 31 nine-letter words that start with COS in our combined English word list. Other dictionaries give different totals, so switch dictionary at the top of the list to compare.

What is the highest-scoring nine-letter word that starts with COS?

COSMOLOGY is worth 17 points in Scrabble before any bonus squares. Other strong options are COSMOGONY (17), COSMOGENY (17), COSPHERED (17).

What are some common nine-letter words that start with COS?

Everyday examples include COSMOLOGY, COSMONAUT, COSTLIEST, COSTUMING, COSMETICS, COSMOGONY, COSPONSOR, COSTARRED. Sort the list by "Most common" to see the familiar words first.

Which rare nine-letter words that start with COS score well?

Uncommon but valid choices include COSMOGENY (17), COSPHERED (17), COSTIVELY (17), COSTUMERY (16). Few players know them, so they can catch an opponent off guard.