difference threshold vs limen

difference threshold and limen both are nouns.

Word	Noun	Adjective	Verb	Adverb
difference threshold	Yes	No	No	No
limen	Yes	No	No	No

As nouns, limen is a hypernym of difference threshold; that is, limen is a word with a broader meaning than difference threshold:

difference threshold: the smallest change in stimulation that a person can detect
limen: the smallest detectable sensation

Other hypernyms of difference threshold include threshold.

difference threshold (noun)	limen (noun)
the smallest change in stimulation that a person can detect	the smallest detectable sensation