sweet melon vs sweet melon

sweet melon and sweet melon both are nouns.

Word	Noun	Adjective	Verb	Adverb
sweet melon	Yes	No	No	No
sweet melon	Yes	No	No	No

sweet melon (noun)	sweet melon (noun)
the fruit of a muskmelon vine; any of several sweet melons related to cucumbers	the fruit of a muskmelon vine; any of several sweet melons related to cucumbers
any of several varieties of vine whose fruit has a netted rind and edible flesh and a musky smell	any of several varieties of vine whose fruit has a netted rind and edible flesh and a musky smell