Syllables    Rhymes    Quiz

radioactivity

How many syllables in radioactivity?

  7 syllables

Divide radioactivity into syllables:   ra-di-o-ac-tiv-i-ty
How to pronounce radioactivity:   rey-dee-oh-ak-tiv-i-tee
How to say radioactivity:

Cite This Source

Bibliography Citations
MLA   |    APA   |   Chicago Manual Style
"radioactivity." HowManySyllables.com. How Many Syllables, n.d. Web. 13 December 2025.

Learn a New Word

Wondering why radioactivity is 7 syllables?   Contact Us!   We'll explain.

Syllable Rules

1.  What is a syllable?
2.  How to count syllables.
3.  How to divide into syllables.

More Grammar
Trending Words
Grammar Quiz
Which should you use
affect or effect?
Take the Grammar Quiz

Syllables    Rhymes    Quiz

What rhymes with radioactivity

3 syllables
    4 syllables
    5 syllables
    6 syllables
      7 syllables
        Let Teachers Teach™ Contest
        One $250 prize is awarded
        to one teacher, every month,
        to help teachers teach their students.
        $Read the contest rules and apply
        Fun Fact
        Brunch = Breakfast + Lunch
        This is a portmanteau.
        !Get more facts
        FAQ
        When should you use
        A vs. An before a word
        ?A vs. An Rules
        Do You Know
        when you should use
        Was and Were?
        Find Out Here

        Parents, Teachers, StudentsDo you have a grammar question?
        Need help finding a syllable count?
        Want to say thank you?

        Contact Us!