Home Misspellings How to spell retardent? Retardent or retardant? Which one is correct? by hersey July 19, 2018 Reading Time: 0min, 7sc + - 0 Retardent or retardant Which one is correct? You can find the answer below. Incorrect Retardent Correct Retardant You can find more information about Retardant word here. Rate this post Correct spelling of RetardentHow do you spell Retardent