tools
pontoon
oil
There are none. Not even a 3 letter word
Oxblood is a 7 letter word with 3 o's. It is a color. It is a dark shade of red that resembles burgundy.
zoo
tools
pontoon
"Yellow" is a 6-letter word with 3 vowels (e, o, and o) and 3 consonants (y, l, and w).
The riddle is describing a sequence where the first letter of the word "first" is 'f', the second letter of the word "you" is 'o', the double of 'f' is 'ff' (the second letter of "off"), the first letter of the word "last" is 'l', and the last letter of "you" is 'u'. Putting it all together, the answer is "follow."
off
dog
oil
Owl is an animal. It is a 3 letter word.
another
· oodles · oomph · oops · ooze
You don't. The letter O is a letter, not a word. The word "oh" is a word but it does not stand for the letter O.