Neat, clean and tidy in basic terms are synonyms. For the specific differences between them, see the links.
neat clean tidy
clean ,neat ,organized
clean ,neat ,organized
That is the correct spelling of the adjective "tidy" (clean, neat, orderly).
The opposite of messy is tidy or neat.
tidy, neat, straight, clean, shipshape.
Organized, clean, tidy, nice, sorted
Synonyms can include tidy, clean, orderly, organized, or shipshape.
Clean Freak, Neat, Perfectionist
When something is clean or organized to look very nice it is tidy. "Tidy" means "clean" kind of. example: "the room is tidy", meaning it is clean, and not messy "Tidy" means "clean" kind of. example: "the room is tidy", meaning it is clean, and not messy"Jack, please tidy your bedroom!" his Mother called from the foot of the stairs.
This area must be neat and tidy prior to the captain's arrival.
Synonyms are words that mean the same or almost the same thing. Some synonyms for the word "tidy" would be: clean, orderly, organized, neat.