IPA: /ˈkwɪzər/
KK: /kwɪzər/
A person who asks questions or participates in a quiz.
The quizzer challenged the contestants with difficult questions.
Quizzer → The word 'quizzer' is formed from 'quiz' (originating from the late 18th century, possibly from a playful alteration of 'quiz' meaning a test or examination) and '-er' (meaning a person who). A quizzer is a person who takes or participates in a quiz.
Think of someone who participates in a 'quiz' — the '-er' just means a person. A quizzer is someone who takes part in a quiz.
No commonly confused words.