Is “Tweet” a Scrabble word?
Yes
TWEET
Valid in at least one Scrabble dictionary
Valid in these dictionaries
SOWPODS / CSW
Scrabble UK & International
TWL / NWL
Scrabble North America
Large English Dictionary
General English word list
Meaning of Tweet
/twiːt/
noun
1.The sound of a bird; any short high-pitched sound or whistle.
2.An entry posted on the microblogging service Twitter.
verb
1.To make a short high-pitched sound, like that of certain birds.
2.To post an update to Twitter.
interjection
1.An onomatopoeic of bird singing.