memory apparatus vs mnemometer

memory apparatus and mnemometer both are nouns.

Word	Noun	Adjective	Verb	Adverb
memory apparatus	Yes	No	No	No
mnemometer	Yes	No	No	No

As nouns, memory apparatus and mnemometer are synonyms defined as:

memory apparatus and mnemometer: An outdated mechanical device used for presenting a series of stimuli to be memorized.

memory apparatus (noun)	mnemometer (noun)
An outdated mechanical device used for presenting a series of stimuli to be memorized.	An outdated mechanical device used for presenting a series of stimuli to be memorized.