The French word, like the word in general, has a large series of characteristics starting with the phonetic word, graphic word, syntactic word, senseless word. Then follow the phonic qualities of the word: aesthetics, expressiveness, volume of word: long words and short words, brief/isolated words, the exploited length of the word, denotativeconnotative word. In short,,,the quality of the word is a function of its form and its nature”. The poetic language has its laws, its rules and its code. The poetic norms play a large part in this. Among its laws, there is one that is essential: words must be monosyllabic and polysyllabic, but their length should not in principle exceed three or four syllables. Those that have an exaggerated length are to be avoided especially in poetics and their names have a depreciative connotation: nested word, centaur word, ghost word, overflowing word, ultra-wild word, portmanteau word. The latter already has the appearance of a term and it is fixed and defined by lexicographic sources (Rheims, 1969; Manoli, 2022). Ultimately, the nested word (chemin de ferresque - Léon-Paul Fargue; abracadabrantesque (A. Rimbaud), or the overcompound (just-to-see-her-passing-we-were-telling-her-thank-you – H. Bazin) appears as a specific type of interaction, and its management in various registers remains to be always rare and delicate: their translation and interpretation require prudence, philological taste and experience.