I am working on synonyms and diagraphs.

I need a 7 letter word, that means finished. The third letter is r. Fifth letter is probably u.

http://www.thesaurus.com/browse/finished?s=t

To find a 7-letter word that means "finished" and meets the given criteria, we can follow these steps:

1. Begin with a thesaurus search for synonyms of "finished." Some possible synonyms are "completed," "concluded," or "terminated."

2. Apply the criteria given:
- Third letter is "r." Cross-reference the synonyms obtained in step 1 to see if any of them have "r" as the third letter.
- Fifth letter is probably "u." Check if any of the remaining words from step 2 have "u" as the fifth letter.

Using these steps, we can find a 7-letter word that fits the criteria: "secured."