slow time scale vs extended time scale

slow time scale and extended time scale both are nouns.

Word	Noun	Adjective	Verb	Adverb
slow time scale	Yes	No	No	No
extended time scale	Yes	No	No	No

As nouns, slow time scale and extended time scale are synonyms defined as:

slow time scale and extended time scale: (simulation) the time scale used in data processing when the time-scale factor is greater than one

slow time scale (noun)	extended time scale (noun)
(simulation) the time scale used in data processing when the time-scale factor is greater than one	(simulation) the time scale used in data processing when the time-scale factor is greater than one