Ternions, also known as triplets or trios, refer to a group of three things or persons. Synonyms for ternions include "trinity," "triad," "triple," and "threesome." Additionally, the word "triplet" specifically refers to a group of three identical items or individuals. Other alternatives include "triptych," "triune," and "triplex." These synonyms can be used interchangeably depending on the context and style of writing. When it comes to describing a group of three people, gestalt theory suggests that the whole of the ternion is greater than the sum of its parts - a meaningful and interesting concept to consider!