Synonyms for the term "sulphoichthyolic acid" are rather limited due to its specialized nature. This compound is commonly used in scientific literature to describe a specific type of acid present in certain marine organisms. While there may not be exact alternatives to this term, some related phrases or mentions can be employed. One could use "sulphuric acid associated with fish", "acid found in marine species" or "ichthyolic acid containing sulphur". Although not true synonyms, these phrases encapsulate the essence of the term, conveying a similar meaning to aid readers in comprehending the nature and significance of sulphoichthyolic acid.