Oldtimer and Skillful

Oldtimer noun - An experienced person who has been through many battles; someone who has given long service.

Skillful and oldtimer are semantically related. in able to perform topic. In some cases you can use "Skillful" instead an adjective "Oldtimer".

Skillful adjective - Accomplished with trained ability.

Oldtimer and skillful are semantically related. Sometimes you can replace term "Oldtimer" with "Skillful", this adjectives are similar.