Archaism

Definition:

• (a.) An ancient, antiquated, or old-fashioned, word, expression, or idiom; a word or form of speech no longer in common use.
• (a.) Antiquity of style or use; obsoleteness.

Compare archaism with other words:

archaism vs. obsoletism

archaism vs. archaist

antiquarianism vs. archaism

alarum vs. archaism

archaism vs. archon

archaeology vs. archaism

archaic vs. archaism