本店: main or flagship shop, store, or branch; this shop or branch

手本: model, example

(Kansai, more emphatic) Alternative form of あほ (aho, “idiot”)

本線: main or trunk line, such as a railroad line or electrical line

what

what / that thing (used in place of words you can't remember at the moment.)

what number, how many (used with a counter) / (used with も) many (used with a counter)

something

nothing

what is this?