Repartee: a sharp, witty, or aphoristic remark made as a reply
Sangfroid: coolness of mind; calmness; composure
Tete-a-tete: a private conversation or interview, usually between two people, without the intrusion of a third person; in intimate privacy.
Tour de force: an exceptional achievement by an artist, author, or the like, a particularly adroit maneuver or technique in handling a difficult situation
Vignette: a decorative design or small illustration used on the title page of a book or at the beginning or end of a chapter, a decorative design representing branches, leaves, grapes, or the like, as in a manuscript, an engraving, drawing, photograph, or the like that is shaded off gradually at the edges so as to leave no definite line at the border.