malt sugar vs maltose

malt sugar and maltose both are nouns.

Word	Noun	Adjective	Verb	Adverb
malt sugar	Yes	No	No	No
maltose	Yes	No	No	No

As nouns, malt sugar and maltose are synonyms defined as:

malt sugar and maltose: a white crystalline sugar formed during the digestion of starches

malt sugar (noun)	maltose (noun)
a white crystalline sugar formed during the digestion of starches	a white crystalline sugar formed during the digestion of starches