Fair dues
Fair is correct for this usage.
There is no anagram. They do spell the word pairs "fair rap" and "fair par." The longest word is "friar."
fair, as in, It's fair. It's not fair. : Es justo. No es justo. fair, as in, at the fair, county fair : feria
The word "fair" can be written as "foire" in French.
The Engish word for the noun feria is "fair" (e.g. trade fair, county fair, book fair).
fare
Faire OR Fayre
The likely word is festival (a celebration or fair).
I like to ride the roller-coaster at the fair.
The likely word is "festival" (a feast, fair, or celebration).
The US spelling is fair (festival, pageant) but some venues, mostly in the UK, use the pseudo-archaic form "summer fayre."
Fair Fare is what you pay on a bus or train. Fair can be light coloured hair or something that is honest and agreeable, it's opposite is unfair or not fair.