Open English Wordnet
Nouns
(n)bulluncastrated adult male of domestic cattle (n)bull, bruiser, strapper, Samsona large and strong and heavyset man“he was a bull of a man”,
“a thick-skinned bruiser ready to give as good as he got” (n)bulla serious and ludicrous blunder“he made a bad bull of the assignment” (n)bullan investor with an optimistic market outlook; an investor who expects prices to rise and so buys now for resale later (n)bull, papal bulla formal proclamation issued by the pope (usually written in antiquated characters and sealed with a leaden bulla) (n)bullmature male of various mammals of which the female is called ‘cow’; e.g. whales or elephants or especially cattle Verbs
(v)bulltry to raise the price of stocks through speculative buying (v)bulladvance in price“stocks were bulling”