Is “Flareup” a Scrabble word?
Yes
FLAREUP
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 Flareup
noun
1.A sudden outbreak, outburst or eruption (originally of flame, but now used more generally of any violent activity or emotion).
2.A sudden intensification in activity.