Something that is lost and then found is recovered.
The word is "classifieds" (classified ads).
There is no one-word substitute in English for "son-in-law."
The word you want is florist.
Sportsmanship is a word substitute for spirit of game
The word metalworking is one word.
eat, use
The word that works is idiot.
The analogy of lost is to found as autumn is to spring. Both pairs involve a transition from one state to another - from being lost to being found, and from one season to another.
what word can I substitute for constitutes
Elevate
Traditionalist
Deaf