An archaic term for ship of the line, a type of warship used from the 17th century to the 19th century

Ocean liner, a type of modern-day passenger ship

Low-ionization nuclear emission-line region (LINER), a class of galactic nuclei (also used to refer to galaxies with such nuclei)

Eye liner, a type of makeup

Landfill liner, a membrane placed at the bottom of landfills

Liner, a sable brush used by coach painters