Honeydew melon and Sweet melon

Honeydew melon noun - Any of a variety of muskmelon vines having fruit with a smooth white rind and white or greenish flesh that does not have a musky smell.

Sweet melon and honeydew melon are semantically related. In some cases you can use "Sweet melon" instead a noun phrase "Honeydew melon".

Sweet melon noun - Any of several varieties of vine whose fruit has a netted rind and edible flesh and a musky smell.

Honeydew melon and sweet melon are semantically related. Sometimes you can replace phrase "Honeydew melon" with "Sweet melon", this phrases are similar.