Which to use
“main” is an adjective and “mast” is a noun - they look or sound alike but fill different roles in a sentence.
- #574
- “main” frequency rank
- #14,584
- “mast” frequency rank
- 15158
- confusion score
Side-by-Side Comparison
| Feature | main | mast |
|---|---|---|
| Definition | Of chief or leading importance; prime, principal. | A tall, slim post or tower, usually tapering upward, used to support, for example, sails or observation platforms on a ship, the main rotor of a helicopter, flags, floodlights, meteorological instruments, or communications equipment, such as an aerial, usually supported by guy-wires (except in the case of a helicopter). |
Where the spellings diverge
Shared letters are muted; the letters that actually set main and mast apart are highlighted. They share 2 letters in sequence, which is exactly why the eye skips the difference.
Spelling & Dictionary Insight
main and mast form a confusable pair in the English index, two distinct headwords that are easily confused because they look alike, sound alike, or both. They share most of their letters but differ in 2 positions - close enough that the eye skips over the difference, far enough that meaning fully diverges. Our composite confusion score for this pair is 15158, derived from the frequency rank of both members and their visual similarity.
main is recorded at frequency rank #574, classified as anadj, pronounced /meɪn/. mast is at rank #14,584, tagged as anoun, pronounced /mɑːst/.
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 15158, this pair ranks #465,730 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.
Frequency comparison
Frequently Asked Questions
Can "main" and "mast" be used interchangeably?
Remembering main vs mast
The fastest way to pick the right one every time.
- Check the role first: if you need an adjective, it's “main”; for a noun, it's “mast”.
- See each word in full, definition, IPA, etymology and its other confusables. Full “main” entry
- Browse more pairs most likely to be confused. Most confusable