Goody-goodies are individuals who tend to behave in a morally upright and law-abiding manner. However, some people find their behavior to be annoying or insincere. Therefore, there are several synonyms for goody-goodies that can be used to describe such individuals. These synonyms include "brown-nose," "suck-up," "teacher's pet," "overachiever," "angel," "perfect," "saint," and "straight-laced." While some of these synonyms may be more derogatory than others, they all convey the same idea of an individual who is perceived to be too good or perfect in their behavior.