He: What is the only one common, uncapitalized 7-letter English word, containing just a single vowel, that does not include the letter s within it? (Puzzlemaster Will Shortz).

I: How about an uncapitalized 8-letter word, less common, but widely accepted with a single vowel, no s as well? One only exists – as far as I know. (Ady Tzidon)

You: Find both. (Addressed to flooble solvers).