Which to use
“monthly” is an adjective and “mostly” is an adverb - they look or sound alike but fill different roles in a sentence.
- #3,010
- “monthly” frequency rank
- #1,568
- “mostly” frequency rank
- 4578
- confusion score
Side-by-Side Comparison
| Feature | monthly | mostly |
|---|---|---|
| Definition | Occurring every month. | Mainly or chiefly; for the most part; usually, generally, on the whole. |
Where the spellings diverge
Shared letters are muted; the letters that actually set monthly and mostly apart are highlighted. They share 5 letters in sequence, which is exactly why the eye skips the difference.
Spelling & Dictionary Insight
monthly and mostly form a confusable pair in the English index, two distinct headwords that are easily confused because they look alike, sound alike, or both. They differ by 1 letter(s) in length - close enough that the eye skips over the difference, far enough that meaning fully diverges. Our composite confusion score for this pair is 4578, derived from the frequency rank of both members and their visual similarity.
monthly is recorded at frequency rank #3,010, classified as anadj, pronounced /ˈmʌnθli/. mostly is at rank #1,568, tagged as anadv, pronounced /ˈməʊstli/.
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 4578, this pair ranks #518,434 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.
Frequency comparison
Frequently Asked Questions
Can "monthly" and "mostly" be used interchangeably?
Remembering monthly vs mostly
The fastest way to pick the right one every time.
- Check the role first: if you need an adjective, it's “monthly”; for an adverb, it's “mostly”.
- See each word in full, definition, IPA, etymology and its other confusables. Full “monthly” entry
- Browse more pairs most likely to be confused. Most confusable