Words that start with 'cos' and contain 'a'


With a copious amount of words to choose from (132 entries), there's no shortage of options.

5 letter words

  • costa

6 letter words

  • coseat
  • cossas
  • costae
  • costal
  • costar

7 letter words

  • cosaque
  • cosmati
  • cossack
  • costaea
  • costage
  • costard
  • costars
  • costata
  • costate
  • costean
  • costula

8 letter words

  • cosalite
  • cosavior
  • cosecant
  • cosharer
  • cosheath
  • cosinage
  • cosmical
  • cosonant
  • cossacks
  • cossaean
  • cossidae
  • costally
  • costards
  • costated
  • costmary

9 letter words

  • coscoroba
  • cosecants
  • coseismal
  • cosenator
  • coservant
  • cosmocrat
  • cosmolabe
  • cosmonaut
  • cosmorama
  • cosmozoan
  • costalgia
  • costander
  • costanoan
  • costarred
  • cosustain
  • coswearer

10 letter words

  • coseasonal
  • cosingular
  • cosmetical
  • cosmically
  • cosmocracy
  • cosmogonal
  • cosmolatry
  • cosmonauts
  • cosmoramic
  • cosmozoans
  • costarring
  • costeaning
  • costellate
  • costmaries
  • costraight

11 letter words

  • cosectarian
  • cosectional
  • cosignatory
  • cosignitary
  • cosymmedian
  • cosmetician
  • cosmicality
  • cosmocratic
  • cosmography
  • cosmonautic
  • cosmopathic
  • cosmorganic
  • costispinal
  • costoapical
  • costulation

12 letter words

  • coscinomancy
  • cosmetically
  • cosmogonical
  • cosmographer
  • cosmographic
  • cosmological
  • cosmonautics
  • cosmoplastic
  • cosmopolitan
  • costipulator
  • costocentral
  • costopleural
  • costosternal

13 letter words

  • cosignatories
  • cosmochemical
  • cosmographies
  • cosmographist
  • cosmonautical
  • cosmopolitans
  • costicervical
  • costochondral
  • costocoracoid
  • costoscapular
  • costothoracic
  • cosubordinate

14 letter words

  • cosmetological
  • cosmographical
  • cosmologically
  • cosmopolitanly
  • cosmopolitical
  • cosmotellurian
  • costicartilage
  • costoabdominal
  • costopulmonary
  • costovertebral

15 letter words

  • cosignificative
  • cosmonautically
  • cosmopolitanise
  • cosmopolitanism
  • cosmopolitanize
  • costoclavicular
  • costotrachelian
  • costotransverse

16 letter words

  • coscinodiscaceae
  • cosmographically
  • cosmopolitanised
  • cosmopolitanized
  • costotransversal

17 letter words

  • cosmopolitanising
  • cosmopolitanizing

18 letter words

  • costicartilaginous
  • costodiaphragmatic

19 letter words

  • cosmopolitanisation
  • cosmopolitanization

In Scrabble, what is the highest score possible from words that start with 'cos' and contain 'a'?
As there are so many words to decide on, your best bet is 'cosaque' which scores 18 points.

How many characters does the longest word on this page contain?
The longest word is 19 letters long, which is 'cosmopolitanisation'.

What is the most popular word that starts with 'cos' and includes 'a'?
The most well-known word in the dictionary is 'cosmopolitan', which is in fact the 24475th most common word in this list.

How many words are there using these particular combinations of letters?
There are 132 words you're able to choose for words that start with 'cos' and include 'a'.

Which word from this list is the most unusual?
We consider that 'costate' to be the most strange word on this page. According to the English dictionary, 'costate' means "Having ribs, or the appearance of ribs; (Bot.) having one or more longitudinal ribs.".