lower limit vs minimum

lower limit and minimum both are nouns.

Word	Noun	Adjective	Verb	Adverb
lower limit	Yes	No	No	No
minimum	Yes	Yes	No	No

As nouns, lower limit and minimum are synonyms defined as:

lower limit (noun)	minimum (noun)
the limit on the lower (or southernmost) side of something	the point on a curve where the tangent changes from negative on the left to positive on the right
the smallest possible quantity	the smallest possible quantity

lower limit (adjective)	minimum (adjective)
	the least possible