quizzer vs tester

quizzer and tester both are nouns.

Word	Noun	Adjective	Verb	Adverb
quizzer	Yes	No	No	No
tester	Yes	No	No	No

As nouns, quizzer and tester are synonyms defined as:

quizzer and tester: someone who administers a test to determine your qualifications

Other synonyms of quizzer include examiner.

quizzer (noun)	tester (noun)
someone who administers a test to determine your qualifications	a flat canopy (especially one over a four-poster bed)
	someone who administers a test to determine your qualifications