Nouns

(n)climax, flood tidethe highest point of anything conceived of as growing or developing or unfolding“the climax of the artist's career”, “in the flood tide of his success”
(n)climax, culminationthe decisive moment in a novel or play“the deathbed scene is the climax of the play”
(n)orgasm, climax, sexual climax, comingthe moment of most intense pleasure in sexual intercourse
(n)climaxthe most severe stage of a disease
(n)climaxarrangement of clauses in ascending order of forcefulness

Verbs

(v)culminate, climaxend, especially to reach a final or climactic stage“The meeting culminated in a tearful embrace”