ether vs archaism

ether and archaism both are nouns.

Word	Noun	Adjective	Verb	Adverb
ether	Yes	No	No	No
archaism	Yes	No	No	No

ether (noun)	archaism (noun)
a colorless volatile highly flammable liquid formerly used as an inhalation anesthetic	the use of an archaic expression
a medium that was once supposed to fill all space and to support the propagation of electromagnetic waves
any of a class of organic compounds that have two hydrocarbon groups linked by an oxygen atom
the fifth and highest element after air and earth and fire and water; was believed to be the substance composing all heavenly bodies