lipid vs lipoid

lipid and lipoid both are nouns.

Word	Noun	Adjective	Verb	Adverb
lipid	Yes	No	No	No
lipoid	Yes	No	No	No

As nouns, lipid and lipoid are synonyms defined as:

lipid and lipoid: an oily organic compound insoluble in water but soluble in organic solvents; essential structural component of living cells (along with proteins and carbohydrates)

Other synonyms of lipid include lipide.

lipid (noun)	lipoid (noun)
an oily organic compound insoluble in water but soluble in organic solvents; essential structural component of living cells (along with proteins and carbohydrates)	an oily organic compound insoluble in water but soluble in organic solvents; essential structural component of living cells (along with proteins and carbohydrates)