The letters DRIVEF can spell the word "fervid" (enthusiastic, from hot). The noun form is the more familiar "fervor".
They can spell smaller words such as drive, fired, diver, and vied.
The letters in "these letters" can spell the phrase "ether settles." The letters can spell shorter words such as trestles, sheerest, shelters, and treeless.
The letters can spell the anagram "annotation."
Those letters will spell the verb launder.
Those letters spell after.
Those letters spell eczema.
Those letters spell natural.
The letters in "these letters" can spell the phrase "ether settles." The letters can spell shorter words such as trestles, sheerest, shelters, and treeless.
Those letters will spell dollar.
The letters spell 'broccoli'.
Those letters spell psycho.
Those letters will spell carnivore.
The letters can spell the anagram "annotation."
Those letters will spell democratic.
Those letters will spell turnip.
Those letters will spell artichoke.
Those letters will spell hairy.
The letters spell the word temples.