"Marked transformations" refer to significant changes that are noticeable or easily perceived. Synonyms for this phrase could include "major metamorphoses," "significant alterations," "substantial revisions," "profound shifts," "dramatic adjustments," or "distinctive modifications." These alternative phrases all convey the idea that something has undergone a significant change that is not easily overlooked. Marked transformations could be physical (such as a person's appearance), cognitive (such as a shift in thinking or worldview), or situational (such as a change in job or living situation). The choice of synonym will depend on the context in which the phrase is used, but each option conveys the idea of change that is significant and potentially impactful.