totalisator vs computer

totalisator and computer both are nouns.

Word	Noun	Adjective	Verb	Adverb
totalisator	Yes	No	No	No
computer	Yes	No	No	No

As nouns, computer is a hypernym of totalisator; that is, computer is a word with a broader meaning than totalisator:

totalisator: computer that registers bets and divides the total amount bet among those who won
computer: a machine for performing calculations automatically

totalisator (noun)	computer (noun)
computer that registers bets and divides the total amount bet among those who won	a machine for performing calculations automatically
	an expert at calculation (or at operating calculating machines)