Collocations for decoration - noun

Christmas, Halloween, etc.
festive, holiday (AmE), seasonal (esp. AmE)
beautiful
elaborate, lavish, ornate
colourful/colorful
Christmas-tree
table
mural, wall
architectural
floral
carved, engraved, painted

hang, put up
put away, take down
The decorations were taken down and put away for another year.

add, apply
Decoration is applied to the plates before the final firing.

hang
Christmas decorations hung from every corner.

come down (esp. BrE)
It's time for the decorations to come down.

adorn sth

home (esp. AmE), interior
set
An Oscar was given for the art direction and set decoration.

design (esp. BrE)
The interior decoration was designed by Pernassi.

military
numerous
Sean had received numerous decorations, including the Purple Heart.

award sb
receive

decorations committee (AmE)

decoration for
the country's highest decoration for bravery (BrE)
the country's highest decoration for valor (AmE)