adder vs figurer

adder and figurer both are nouns.

Word	Noun	Adjective	Verb	Adverb
adder	Yes	No	No	No
figurer	Yes	No	No	No

As nouns, figurer is a hypernym of adder; that is, figurer is a word with a broader meaning than adder:

Other hypernyms of adder include calculator, computer, estimator, reckoner.

adder (noun)	figurer (noun)
small terrestrial viper common in northern Eurasia	an expert at calculation (or at operating calculating machines)
a machine that adds numbers
a person who adds numbers