flare, flame up, blaze up, burn up -- (burn brightly; "Every star seemed to flare with new intensity")
flare out, flare -- (become flared and widen, usually at one end; "The bellbottom pants flare out")
flare, flame -- (shine with a sudden light; "The night sky flared with the massive bombardment")
erupt, irrupt, flare up, flare, break open, burst out -- (erupt or intensify suddenly; "Unrest erupted in the country"; "Tempers flared at the meeting"; "The crowd irrupted into a burst of patriotism")
Overview of adj flaring
The adj flaring has 1 sense
aflare, flaring -- (streaming or flapping or spreading wide as if in a current of air; "ran quickly, her flaring coat behind her"; "flags aflare in the breeze")