Lipid and Sterol

Lipid noun - An oily organic compound insoluble in water but soluble in organic solvents; essential structural component of living cells (along with proteins and carbohydrates).

Sterol and lipid are semantically related. In some cases you can use "Sterol" instead a noun "Lipid".

Sterol noun - Any of a group of natural steroid alcohols derived from plants or animals; they are waxy insoluble substances.

Lipid and sterol are semantically related. You can use "Lipid" instead a noun "Sterol".