The word 'traveling' is the gerund, a verbal noun, of the verb 'to travel'. A gerund is the present participle of the verb that can be used for all of the functions of a noun, the subject of a sentence or clause, and the object of a verb or a preposition. For example:
Subject: Traveling gives a person perspective on life.
Object of the verb: I enjoy traveling very much.
Object of the preposition: You need a passport for world traveling.
Yes, the noun 'traveller' (or traveler, US spelling) is a common noun, a general word for someone going from place to place, or someone who habitually goes from place to place.
Traveller
Persian Traveller. has written: 'Remarks of a Persian traveller on the principal courts of Europe'
Hart Traveller is 5' 1".
Kalea Traveller is 167.64 cm.
The Unfortunate Traveller was created in 1594.
The Traveller's Baggage was created in 1973.
Traveller's Tales was created in 1989.
Gulf Traveller ended in 2007.
Gulf Traveller was created in 2003.
Traveller's Samples was created in 1951.
Fox Traveller was created in 2008.