Apt and Oldtimer

Apt adjective - Having a tendency to be or act in a certain way.

Oldtimer and apt are semantically related In some cases you can replace term "Oldtimer" with "Apt", this adjectives are similar.

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

Apt and oldtimer are semantically related in able to perform topic. Sometimes you can use "Apt" instead an adjective "Oldtimer".