* Genetically modified organism (GMO): This is the most common and widely used term.

* Genetically engineered organism (GEO): This term emphasizes the process of altering the organism's genetic makeup.

* Modified organism or Modified species: These terms are less specific but can be used in certain contexts.

* Transgenic: This is a more technical term that specifically refers to the presence of foreign DNA in the organism.

It's important to note that "transgenic" is a more specific term than "GMO" or "GEO," as it only refers to organisms that have been modified with DNA from a different species. "GMO" and "GEO" are broader terms that encompass any organism whose genetic makeup has been altered through genetic engineering techniques.