Bock and Lager beer

Bock noun - A very strong lager traditionally brewed in the fall and aged through the winter for consumption in the spring.

Lager beer and bock are semantically related. In some cases you can use "Lager beer" instead a noun "Bock".

Lager beer noun - A general term for beer made with bottom fermenting yeast (usually by decoction mashing); originally it was brewed in March or April and matured until September.

Bock and lager beer are semantically related. Sometimes you can replace term "Bock" with "Lager beer", this terms are similar.