Which to use
“serious” is an adjective and “seriously” is an adverb - they look or sound alike but fill different roles in a sentence.
- #836
- “serious” frequency rank
- #1,235
- “seriously” frequency rank
- 2071
- confusion score
Side-by-Side Comparison
| Feature | serious | seriously |
|---|---|---|
| Definition | Without humor or expression of happiness; grave in manner or disposition. | In a serious or literal manner. |
Where the eye mixes serious and seriously
Muted = shared; highlighted = the visual trap. They share 7 letters in sequence.
Spelling & Dictionary Insight
These two trip readers on the page rather than in the ear: serious is /ˈsɪə̯.ɹi.əs/ while seriously is /ˈsɪə.ɹi.əs.li/. Spoken aloud the problem disappears. In writing it persists, because they differ by 2 extra letter(s) - “serious” sits inside “seriously”, and the parts of speech differ too (adjective vs adverb), which is usually the fastest check. Our composite confusion score for this pair is 2071, derived from the frequency rank of both members and their visual similarity.
serious is recorded at frequency rank #836, classified as anadj, pronounced /ˈsɪə̯.ɹi.əs/. seriously is at rank #1,235, tagged as anadv, pronounced /ˈsɪə.ɹi.əs.li/.
Glosses for this pair are partially populated in our dataset, but the full side-by-side definitions above should still guide you to the right choice.
With a confusion score of 2071, this pair ranks #525,934 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of serious vs seriously
Shared letters: eiorsu. Private to "serious": -. Private to "seriously": ly.
"serious" · 7 letters · shape CVCVVVC · "seriously" · 9 letters · shape CVCVVVCCV