A mythical humanoid creature with one eye is a cyclops (plural Cyclopes).
The rarely used adjective that means with one eye is monocular.
(also used for a one-eyed binocular device or telescope)
Invisible
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.
what word can I substitute for constitutes
Elevate
Traditionalist
Deaf
Omnipresent