Ten open and ten closed words with u

Ten open and ten closed words with u

Open syllables: mute, use, beauty, pure, duty, sure, you, cut, fuse, huge
Closed syllables: fun, Luke, duck, punk, under, up, cup, lunch, bus, cut

One closed syllable word and one open syllable word in English

The definition of "open syllable" and "closed syllable" is based on the spelling form of words, which is not necessarily scientific and accurate, but is very practical. Words ending with silent e are open syllables; words ending with vowels are absolutely open syllables. Conversely, words ending with consonants are closed syllables

Are open syllables and closed syllables only for monosyllabic words, or for all words?

Open and closed syllables are for all words
For example, translate is a two syllable word, but it is open syllable