Succinctnesses is a word that is rarely used in everyday language. However, its synonyms can be quite useful in conveying the same meaning. Some examples of synonyms for succinctnesses are brevity, conciseness, terseness, pithiness, and laconicism. Brevity implies saying what needs to be said in a few words. Conciseness refers to being brief but still providing all the necessary information. Terseness is similar to brevity and implies using few words to convey a message. Pithiness refers to being forceful and effective in language that is also concise. Laconicism, on the other hand, refers to being concise to the point of appearing to be rude or indifferent. All these synonyms can be used interchangeably with succinctnesses to convey the idea of being concise or brief in communication.