B complex and Water-soluble vitamin

B complex noun - Originally thought to be a single vitamin but now separated into several B vitamins.

Water-soluble vitamin and B complex are semantically related. In some cases you can use "Water-soluble vitamin" instead a noun phrase "B complex".

Water-soluble vitamin noun - Any vitamin that is soluble in water.

B complex and water-soluble vitamin are semantically related. Sometimes you can replace phrase "B complex" with "Water-soluble vitamin", this phrases are similar.