clutter

Short definition from Wiktionary

Noun

1. 1
   A confused disordered jumble of things.
2. 2
   Background echoes, from clouds etc., on a radar or sonar screen.
3. 3
   Alternative form of clowder (“collective noun for cats”).
4. 4
   Clatter; confused noise.
5. 5
   A Sperner family.

Verb

1. 1
   To fill something with clutter.
2. 2
   To clot or coagulate, like blood.
3. 3
   To make a confused noise; to bustle.
4. 4
   To utter words hurriedly, especially (but not exclusively) as a speech disorder (compare cluttering).

Proper noun

1. 1
   A surname.