mezzo-relievo vs half-relief

mezzo-relievo and half-relief both are nouns.

Word	Noun	Adjective	Verb	Adverb
mezzo-relievo	Yes	No	No	No
half-relief	Yes	No	No	No

As nouns, mezzo-relievo and half-relief are synonyms defined as:

mezzo-relievo and half-relief: a sculptural relief between low relief and high relief

Other synonyms of mezzo-relievo include mezzo-rilievo.

mezzo-relievo (noun)	half-relief (noun)
a sculptural relief between low relief and high relief	a sculptural relief between low relief and high relief