Block, but it's usually used in the plural form, blocks.
A word that rhymes with sock and begins with "you" is "yak".
sock
Red sock rhymes with dead hawk.
sock and soul
Sock.
lock
talk and sock
Response
pop it ,lock it ,sock it ,rocket
You can stuff a sock with catnip. Instant cat toy!
lock, sock, anything with ock on the end
mock, dock, sock, flock...