Answer: scoob

AnswerCrossword Clue
SCOOBScrappy-Doo's uncle, to Shaggy
SCOOBShaggy's dog, to Shaggy
SCOOBShaggy's pal, to Shaggy
SCOOBNickname of Shaggy's dog
SCOOBSaturday morning cartoon dog, informally
SCOOBShaggy's nickname for his canine friend