arroba vs liquid unit

arroba and liquid unit both are nouns.

Word	Noun	Adjective	Verb	Adverb
arroba	Yes	No	No	No
liquid unit	Yes	No	No	No

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

arroba: a liquid measure (with different values) used in some Spanish speaking countries
liquid unit: a unit of capacity for liquids (for measuring the volumes of liquids or their containers)

Other hypernyms of arroba include liquid measure.

arroba (noun)	liquid unit (noun)
a unit of weight used in some Spanish speaking countries	a unit of capacity for liquids (for measuring the volumes of liquids or their containers)
a liquid measure (with different values) used in some Spanish speaking countries