What's the noun for melodramatise? Here's the word you're looking for.
melodrama
(archaic, uncountable) A kind of drama having a musical accompaniment to intensify the effect of certain scenes.
(countable) A drama abounding in romantic sentiment and agonizing situations, with a musical accompaniment only in parts which are especially thrilling or pathetic. In opera, a passage in which the orchestra plays a somewhat descriptive accompaniment, while the actor speaks
(uncountable, figuratively, colloquial) Any situation or action which is blown out of proportion.
“He was a melodramatist, infusing all those silly melodramas with style, with signs and meanings.”
“The understated shapes he threw showed even this arch melodramatist knows sometimes less is more.”
“With these allusions, Akerman is both artist and critic — she both plants Proust firmly in the most advanced cinematic tradition and reveals Godard to be a prime melodramatist.”
“The drama, or melodrame, in question was written by the one time director of the Odeon, Frederic Dupetit-Mere.”
“The actors' spoken dialogue is underscored with atmospheric melodrame.”
“Oliver Bara's contribution tracks the evolution of the Opera-Comique's relationship with the Melodrame during the last quarter of the eighteenth century.”
“Apart from the traditions of Italian stage farce it owes as much to silent comedy as the other films owe to the silent cinema's melodramatists.”
“Among the great melodramatists of Hollywood, he's the one who brought a philosophical self-awareness to the genre.”
“As Angel demonstrates, Ozon not only admires the classical cinema's great melodramatists, but also understands their integration of content and style.”
“Ratisbon is the city from which our voyager starts, and many are the legends which he has picked up of castles and monasteries, enough for six tragedies and sixty melodrames.”