halloo vs prod

halloo and prod both are nouns.

Word	Noun	Adjective	Verb	Adverb
halloo	Yes	No	Yes	No
prod	Yes	No	Yes	No

As verbs, prod is a hypernym of halloo; that is, prod is a word with a broader meaning than halloo:

Other hypernyms of halloo include egg on, incite.

halloo (noun)	prod (noun)
a shout to attract attention	a pointed instrument that is used to prod into a state of motion
	a verbalization that encourages you to attempt something

halloo (verb)	prod (verb)
shout `halloo', as when greeting someone or attracting attention	urge on; cause to act
urge on with shouts	poke or thrust abruptly
	to push against gently