The phrase "full growths" refers to the stage of maturity or development that an organism or object has reached. However, there are several different synonyms that can be used in place of this phrase. For instance, one could describe something as being fully matured, fully developed, or fully grown. Other options might include terms like fully formed, fully established, or fully evolved. Alternately, one could simply use the phrases "reached full size" or "grown to full capacity" to describe something that has reached its maximum potential. Ultimately, the choice of synonym will depend on the specific context and the desired tone or emphasis of the message.