A bibliophile loves books
Though it is almost never used for a person, it would be a hydrophile.
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 "loves" has one syllable.
The word metalworking is one word.
what word can I substitute for constitutes
eat, use
The word that works is idiot.
Elevate
A walker is a pedestrian.