Is “Ha” a Scrabble word?
Yes
HA
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 Ha
/hɑː/
interjection
1.A representation of laughter.
“Ha, ha, ha! That’s funny.”
2.An exclamation of triumph or discovery.
“Ha! Checkmate!”
3.An exclamation of grief.