A tercet is a three-line stanza in poetry. However, it has some synonyms that can be used interchangeably, such as triplet, triad, and trefoil. These words have the same meaning as a tercet, but they sound different when used in different contexts. Moreover, a tercet can be used in different poetic forms, such as a haiku or a villanelle. The triplet can also be used in these forms, with the same meaning and arrangement. Triplet is more commonly used in music to describe a group of three notes or chords played together. Additionally, trefoil is a more unusual synonym for tercet, often used in botanical terms for a three-leafed plant or in heraldry for a three-petaled emblem.