is beak a closed syllable word

The word "beak" is not a closed syllable word. It is a single-syllable word, but its syllable is open because it ends with a long vowel sound (the vowel "ea" makes a long "ee" sound) and is not followed by a consonant within the syllable. Closed syllables end with a consonant and have a short vowel sound, but "beak" does not fit this pattern. Thus, "beak" is an open syllable word rather than closed.