* word: This is the base morpheme or root. It carries the core meaning of the word.
* -d: This is a bound morpheme, specifically a suffix indicating the past tense of the verb "to word".
Therefore, the word "word" is a monomorphemic word (meaning it only has one morpheme) when used as a noun. But when used as the past tense of the verb "to word", it becomes a bimorphemic word.