 In Old Norse poetry, either component of a kenning (base-word, determinant or both) could consist of an ordinary noun or a "heiti" "poetic synonym".In the above examples, "fákr" and "marr" are distinctively poetic lexemes; the normal word for "horse" in Old Norse prose is "hestr".The skalds also employed complex kennings in which the determinant, or sometimes the base-word, is itself made up of a further kenning