single cream vs light cream

single cream and light cream both are nouns.

Word	Noun	Adjective	Verb	Adverb
single cream	Yes	No	No	No
light cream	Yes	No	No	No

As nouns, single cream and light cream are synonyms defined as:

Other synonyms of single cream include coffee cream.

single cream (noun)	light cream (noun)
cream that has at least 18% butterfat	cream that has at least 18% butterfat