is a specific kind of: unit, unit of measurement.

is a broader term that covers: long measure | astronomy unit | metric linear unit | nautical linear unit | in, inch | foot, ft | footer | pace, yard | yarder | perch, pole, rod | furlong | international mile, land mile, mi, mile, stat mi, statute mile | miler | 880 yards, half mile | 440 yards, quarter mile | league | ligne | nail | archine | coss, kos | vara | verst | cable, cable's length, cable length | chain | cubit | digit, finger, finger's breadth, fingerbreadth | fistmele | body length | handbreadth, handsbreadth | head | lea | li | link | mesh | mil | mil, mile, Swedish mile | mile, Roman mile | Roman pace | geometric pace | military pace | palm | span | survey mile | fathom, fthm | point | em, pica, pica em | en, nut | cicero ... show more.