equivalent weight vs combining weight

equivalent weight and combining weight both are nouns.

Word	Noun	Adjective	Verb	Adverb
equivalent weight	Yes	No	No	No
combining weight	Yes	No	No	No

As nouns, equivalent weight and combining weight are synonyms defined as:

equivalent weight and combining weight: the atomic weight of an element that has the same combining capacity as a given weight of another element; the standard is 8 for oxygen

Other synonyms of equivalent weight include eq, equivalent.

equivalent weight (noun)	combining weight (noun)
the atomic weight of an element that has the same combining capacity as a given weight of another element; the standard is 8 for oxygen	the atomic weight of an element that has the same combining capacity as a given weight of another element; the standard is 8 for oxygen