The ethanoyl group, also known as the acetyl group, is a functional group consisting of a carbonyl group attached to a methyl group. This group is widely used in organic chemistry to identify and differentiate different types of molecules. Synonyms for ethanoyl group include acyl, carbethoxyl, acetate, ethyl formyl, and ethyl carboxy. These synonyms can be used interchangeably in various chemical reactions and laboratory experiments. Knowing the synonyms for a specific group or functional group is essential for scientists and chemists, as it allows them to communicate and understand chemical compounds accurately.