1 vs 1X, What's the Difference?

Which to use

“1” is an article and “1X” is a noun - they look or sound alike but fill different roles in a sentence.

#98
“1” frequency rank: #33,093
“1X” frequency rank: 33191
confusion score

Side-by-Side Comparison

Feature	1	1X
Definition	Un, une.	Vitesse de lecture et de gravure de disque. Elle vaut 150 ko/s pour les CD, et 1,38 Mo/s pour les DVD.

Where the spellings diverge

Shared letters are muted; the letters that actually set 1 and 1X apart are highlighted. They share 1 letter in sequence, which is exactly why the eye skips the difference.

1 ch

2 ch

Spelling & Dictionary Insight

These two trip readers on the page rather than in the ear: 1 is \œ̃\ while 1X is \œ̃.iks\. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 extra letter(s) - “1” sits inside “1X”, and the parts of speech differ too (article vs noun), which is usually the fastest check. Our composite confusion score for this pair is 33191, derived from the frequency rank of both members and their visual similarity.

1 is recorded at frequency rank #98, classified as anarticle, pronounced \œ̃\. 1X is at rank #33,093, tagged as anoun, pronounced \œ̃.iks\.

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 33191, this pair ranks #292,276 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of 1 vs 1X

Shared letters: none. Private to "1": -. Private to "1X": x.

"1" · 0 letters · shape · "1X" · 1 letters · shape C

Frequency comparison

1#98

1X#33,093

Source: FrequencyWords open word-frequency list

Frequently Asked Questions

Can "1" and "1X" be used interchangeably?

No - they are not even the same part of speech. "1" is an article and "1X" a noun, so a sentence built for one is usually ungrammatical with the other.

Which is more common, "1" or "1X"?

"1" is the more common of the two: it sits at frequency rank #98 in our French list, against #33,093 for "1X". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

Remembering 1 vs 1X

The fastest way to pick the right one every time.

Check the role first: if you need an article, it's “1”; for a noun, it's “1X”.
See each word in full, definition, IPA, etymology and its other confusables. Full “1” entry
Browse more pairs most likely to be confused. Most confusable