The term 'biomass pyramid' refers to the hierarchy of different levels of biomass in a given ecosystem. However, there are several other terms that can be used interchangeably with this term. For example, the term 'food pyramid' is often used as a synonym for 'biomass pyramid', as it emphasizes the transfer of energy from one trophic level to another. Additionally, the term 'ecological pyramid' is sometimes used to refer to the same concept, as it also refers to the hierarchical structure of an ecosystem. Other possible synonyms for this term include 'trophic pyramid', 'energy pyramid', and 'pyramid of numbers'. Ultimately, however, all of these terms refer to the same basic ecological principle.