Which to use
“tireless” is an adjective and “tirelessly” is an adverb - they look or sound alike but fill different roles in a sentence.
- #27,678
- “tireless” frequency rank
- #26,282
- “tirelessly” frequency rank
- 53960
- confusion score
Side-by-Side Comparison
| Feature | tireless | tirelessly |
|---|---|---|
| Definition | Indefatigable, untiring and not yielding to fatigue | In a tireless manner; without tiring, flagging, or ceasing. |
Where the spellings diverge
Shared letters are muted; the letters that actually set tireless and tirelessly apart are highlighted. They share 8 letters in sequence, which is exactly why the eye skips the difference.
Spelling & Dictionary Insight
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: tireless is anadjective and tirelesslyanadverb. On the page they differ by 2 extra letter(s) - “tireless” sits inside “tirelessly”. Our composite confusion score for this pair is 53960, derived from the frequency rank of both members and their visual similarity.
tireless is recorded at frequency rank #27,678, classified as anadj. tirelessly is at rank #26,282, tagged as anadv.
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 53960, this pair ranks #144,817 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of tireless vs tirelessly
Shared letters: eilrst. Private to "tireless": -. Private to "tirelessly": y.
"tireless" · 8 letters · shape CVCVCVCC · "tirelessly" · 10 letters · shape CVCVCVCCCV
Known mistypes of this pair
- tireless ← itreless · tierless · tireelss · tireles · tirelless · tirelses · tirleess · tirreless
- tirelessly ← itrelessly · tierlessly · tireelssly · tireleslsy · tirelesly · tirelesslly · tirelesslyy · tirelessyl
Frequency comparison
Frequently Asked Questions
Can "tireless" and "tirelessly" be used interchangeably?
Which is more common, "tireless" or "tirelessly"?
Remembering tireless vs tirelessly
The fastest way to pick the right one every time.
- Check the role first: if you need an adjective, it's “tireless”; for an adverb, it's “tirelessly”.
- See each word in full, definition, IPA, etymology and its other confusables. Full “tireless” entry
- Browse more pairs most likely to be confused. Most confusable