What word means using a words with many syllables?

There isn't one single word that perfectly captures the act of using words with many syllables. However, depending on the context, you could use words like:

* Polysyllabic: This is the most direct and accurate term. It specifically refers to words with more than one syllable.

* Sesquipedalian: This refers to using long, multisyllabic words, often in a pompous or pretentious way.

* Eloquence: This implies using words that are not only long but also carefully chosen and flowing, creating a beautiful and impactful effect.

* Grandiloquent: Similar to sesquipedalian, but carries a more negative connotation, suggesting an exaggerated or bombastic use of language.

* Prolixity: This refers to the quality of using excessive and often unnecessary words, which can include using many syllables.

* High-flown: This refers to using language that is overly formal or elaborate, often using words with many syllables.

The best word to use will depend on the specific context and the intention behind the use of multisyllabic words.