purr vs whizz

purr and whizz both are nouns.

Word	Noun	Adjective	Verb	Adverb
purr	Yes	No	Yes	No
whizz	Yes	No	Yes	No

As verbs, purr and whizz are synonyms defined as:

Other synonyms of purr include birr, whir, whirr, whiz.

purr (noun)	whizz (noun)
a low vibrating sound typical of a contented cat	someone who is dazzlingly skilled in any field

purr (verb)	whizz (verb)
indicate pleasure by purring; characteristic of cats	move along very quickly
make a soft swishing sound	make a soft swishing sound