The term "illegitimated" can refer to something that is deemed invalid or not accepted as legitimate. Synonyms for this word might include terms like invalidated, disregarded, discredited, or undermined. Other synonyms could include words like nullified, cancelled, repealed, or revoked. When describing something that is illegitimate, you might also use phrases like disowned, unacknowledged, or rejected. Overall, there are many different ways to express the idea of something that is not considered to be legitimate or valid, and each synonym can convey a slightly different nuance or meaning depending on the context in which it is used.