angstrom vs metric linear unit

angstrom and metric linear unit both are nouns.

Word	Noun	Adjective	Verb	Adverb
angstrom	Yes	No	No	No
metric linear unit	Yes	No	No	No

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

angstrom: a metric unit of length equal to one ten billionth of a meter (or 0.0001 micron); used to specify wavelengths of electromagnetic radiation
metric linear unit: a linear unit of distance in metric terms

angstrom (noun)	metric linear unit (noun)
a metric unit of length equal to one ten billionth of a meter (or 0.0001 micron); used to specify wavelengths of electromagnetic radiation	a linear unit of distance in metric terms