1. [v]  group or chunk together in a certain order or place side by side
2. [v]  occur side by side; "The words"new" and"world" collocate"

COLLOCATE is a 9 letter word that starts with C.

1. \Col"lo*cate\, a. [L. collocatus, p. p. of collocare.
   See {Couch}.]
   Set; placed. [Obs.] --Bacon.
   
   

2. \Col"lo*cate\, v. t. [imp. & p. p. {Collocated}; p.
   pr. & vb. n. {Collocating}.]
   To set or place; to set; to station.
   
   
   
      To marshal and collocate in order his battalions. --E.
                                                  Hall.