naturist:
(plural: ‘naturists‘; for the right pronunciation of this word, please click here)
a person who likes to live without clothes on — completely naked, usually lives in private groups, mostly for reasons of religion or health or, less extent, just for fun;
a nudist;
(less common) a person who likes to be in the nature and who appreciates the beauty and the joy the nature gives us,
The main difference that keeps a naturist from a normal person is clothes: a naturist does not like to wear clothes and is not averse to seeing other nude people; whereas a normal person, likes nature (a naturalist) and appreciates being with nature, likes to be in appropriate clothes in public.
There are several clubs all over the Europe exclusively for naturists/nudists who enjoy being naked all the time!
There are several incidents where naturists are arrested but later released without criminal charges because in most countries being naked is not a crime!



