pacing vs meno mosso

pacing and meno mosso both are nouns.

Word	Noun	Adjective	Verb	Adverb
pacing	Yes	No	No	No
meno mosso	Yes	No	No	No

As nouns, meno mosso is a hyponym of pacing; that is, meno mosso is a word with a more specific, narrower meaning than pacing:

Other hyponyms of pacing include accelerando, allegretto, allegro, andante, rubato.

pacing (noun)	meno mosso (noun)
walking with slow regular strides	played at reduced speed; less rapid
(music) the speed at which a composition is to be played