1. Organic compounds containing the group –CO.NH₂ (the amide group). Compounds containing this group are primary amides. Secondary and tertiary amides can also exist, in which the hydrogen atoms on the nitrogen are replaced by one or two other organic groups respectively. Simple examples of primary amides are ethanamide, CH₃CONH₂, and propanamide, C₂H₅CONH₂. They are made by heating the ammonium salt of the corresponding carboxylic acid. Amides can also be made by reaction of ammonia (or an amine) with an acyl halide. See also Hofmann’s reaction.

2. Inorganic compounds containing the ion NH₂-, e.g. KNH₂ and Cd(NH₂)₂. They are formed by the reaction of ammonia with electropositive metals.

Amides

https://www.acdlabs.com/iupac/nomenclature/93/r93_543.htm Information about IUPAC nomenclature