Flownet is a term used for fluid flow modelling that relates to the graphical representation of fluid flow patterns. There are several synonyms for flownet, which include streamlines, streaklines, and pathlines. Streamlines are the continuous lines that follow the path of a fluid particle in steady flow. On the other hand, streaklines are lines formed by particles that have passed through a fixed point in the flow. Pathlines are lines traced by fluid particles as they move along their individual paths in an unsteady flow pattern. Each of these synonyms is useful in understanding fluid dynamics, and they are commonly used interchangeably to describe the behaviour of fluids.