whiz vs whizz

whiz and whizz both are nouns.

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

As nouns, whiz and whizz are synonyms defined as:

Other synonyms of whiz include ace, adept, champion, genius, hotshot, maven, mavin, sensation, star, superstar, virtuoso, wiz, wizard.

As verbs, whiz and whizz are synonyms defined as:

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

whiz (noun)	whizz (noun)
a buzzing or hissing sound as of something traveling rapidly through the air	someone who is dazzlingly skilled in any field
someone who is dazzlingly skilled in any field

whiz (verb)	whizz (verb)
make a soft swishing sound	move along very quickly
	make a soft swishing sound