linear
Relating to or arranged in a straight line; one-dimensional or sequential
The graph shows a linear relationship between the two variables.
lineage
Descent from an ancestor; a sequence of individuals or development
She traced her lineage back several centuries.
lineup
An ordered arrangement or roster of people or items, especially for an event or team
The team's starting lineup was announced before the game.
pipeline
A long tube for transporting liquids or gases; a sequence of processes for moving something forward
The crude oil is transported through a pipeline to the refinery.
airline
A company that provides scheduled air transport for passengers or cargo
She booked a flight with a low-cost airline.
frontline
The position closest to the area of action or greatest activity; at the forefront
Doctors and nurses on the frontline worked tirelessly during the crisis.
headline
The main title of a news article or the most prominent news item
Her success made the headlines across the country.
underline
To draw a line beneath text to emphasize it; to emphasize or stress
The teacher asked us to underline the key terms.
streamline
To make a system or process more efficient and effective by simplifying or eliminating unnecessary steps
The company streamlined its production process to cut costs.
deadline
The latest time or date by which something must be completed
She worked late to meet the project deadline.