palm vs linear unit

palm and linear unit both are nouns.

Word	Noun	Adjective	Verb	Adverb
palm	Yes	No	Yes	No
linear unit	Yes	No	No	No

As nouns, linear unit is a hypernym of palm; that is, linear unit is a word with a broader meaning than palm:

Other hypernyms of palm include linear measure.

palm (noun)	linear unit (noun)
the inner surface of the hand from the wrist to the base of the fingers	a unit of measurement of length
an award for winning a championship or commemorating some other event
any plant of the family Palmae having an unbranched trunk crowned by large pinnate or palmate leaves
a linear unit based on the length or width of the human hand

palm (verb)	linear unit (verb)
touch, lift, or hold with the hands