force unit vs pdl

force unit and pdl both are nouns.

Word	Noun	Adjective	Verb	Adverb
force unit	Yes	No	No	No
pdl	Yes	No	No	No

As nouns, pdl is a hyponym of force unit; that is, pdl is a word with a more specific, narrower meaning than force unit:

force unit: a unit of measurement of physical force
pdl: a unit of force equal to the force that imparts an acceleration of 1 foot/sec/sec to a mass of 1 pound; equal to 0.1382 newtons

Other hyponyms of force unit include dyne, N, newton, sthene, poundal, lbf., pound, pounder, g-force, g, gee, pound.

force unit (noun)	pdl (noun)
a unit of measurement of physical force	a unit of force equal to the force that imparts an acceleration of 1 foot/sec/sec to a mass of 1 pound; equal to 0.1382 newtons