memory trace vs memory

memory trace and memory both are nouns.

Word	Noun	Adjective	Verb	Adverb
memory trace	Yes	No	No	No
memory	Yes	No	No	No

As nouns, memory is a hypernym of memory trace; that is, memory is a word with a broader meaning than memory trace:

memory trace: a postulated biochemical change (presumably in neural tissue) that represents a memory
memory: something that is remembered

memory trace (noun)	memory (noun)
a postulated biochemical change (presumably in neural tissue) that represents a memory	an electronic memory device
	the power of retaining and recalling past experience
	the cognitive processes whereby past experience is remembered
	something that is remembered
	the area of cognitive psychology that studies memory processes