88.
113 words, easy
Words that you can spell with 'duoo' are do and duo.
wogo
The letters ELEDRMA can also spell the word EMERALD.
The letters spell the word calked. They also spell the word lacked.
The letters spell the word impede.
You can spell node and done with those letters.
Those letters will spell dental.
clasped
frodil
Malady.
The longest words are 5 letters: fetid and tepid.