hl vs metric capacity unit

hl and metric capacity unit both are nouns.

Word	Noun	Adjective	Verb	Adverb
hl	Yes	No	No	No
metric capacity unit	Yes	No	No	No

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

hl (noun)	metric capacity unit (noun)
a metric unit of volume or capacity equal to 100 liters	a capacity unit defined in metric terms