impedance vs ohmage

impedance and ohmage both are nouns.

Word	Noun	Adjective	Verb	Adverb
impedance	Yes	No	No	No
ohmage	Yes	No	No	No

As nouns, ohmage is a hyponym of impedance; that is, ohmage is a word with a more specific, narrower meaning than impedance:

impedance: a material's opposition to the flow of electric current; measured in ohms
ohmage: the ohmic resistance of a conductor

impedance (noun)	ohmage (noun)
a material's opposition to the flow of electric current; measured in ohms	the ohmic resistance of a conductor