Is “Ultra” a Scrabble word?
Yes
ULTRA
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 Ultra
/ˈʌltɹə/
noun
1.An ultraroyalist in France.
2.An extremist, especially an ultranationalist.
3.An especially devoted football fan, typically associated with the intimidating use of extremist slogans, pyrotechnics and sometimes hooligan violence.
adjective
1.Extreme; far beyond the norm; fanatical; uncompromising.
“an ultra reformer; ultra measures”