Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun effusion

2 senses of effusion

Sense 1
effusion, gush, outburst, blowup, ebullition -- (an unrestrained expression of emotion)
       => expression, manifestation, reflection, reflexion -- (expression without words; "tears are an expression of grief"; "the pulse is a reflection of the heart's condition")

Sense 2
effusion -- (flow under pressure)
       => flood, overflow, outpouring -- (a large flow)