Bock beer and Lager beer

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

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

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