bog vs by, What's the Difference?

Which to use

“bog” is a noun and “by” is a preposition - they look or sound alike but fill different roles in a sentence.

#18,503
“bog” frequency rank: #24
“by” frequency rank: 18527
confusion score

Side-by-Side Comparison

Feature	bog	by
Definition	An area of decayed vegetation (particularly sphagnum moss) which forms a wet spongy ground too soft for walking.	Near or next to.

Where the eye mixes bog and by

Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.

3 ch

bog

2 ch

Why the eye confuses bog with by

These two trip readers on the page rather than in the ear: bog is /bɔɡ/ while by is /baɪ/. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 letter(s) in length, and the parts of speech differ too (noun vs preposition), which is usually the fastest check. Our composite confusion score for this pair is 18527, derived from the frequency rank of both members and their visual similarity.

bog is recorded at frequency rank #18,503, classified as anoun, pronounced /bɔɡ/. by is at rank #24, tagged as aprep, pronounced /baɪ/.

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 18527, this pair ranks #444,281 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of bog vs by

Shared letters: b. Private to "bog": go. Private to "by": y.

"bog" · 3 letters · shape CVC · "by" · 2 letters · shape CV

Frequently Asked Questions

Do "bog" and "by" mean the same thing in a sentence?

No - they are not even the same part of speech. "bog" is a noun and "by" a preposition, so a sentence built for one is usually ungrammatical with the other.

Frequency check: "bog" vs "by" - which ranks higher?

"by" is the more common of the two: it sits at frequency rank #24 in our English list, against #18,503 for "bog". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

After this comparison

Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.

Full dictionary entry for "bog" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "by" - compare definitions side by side with the headword page. Word entry
This pair ranks #444,281 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
"bog" and "by" also get mixed up with nearby pairs, the highest-scored neighbour is "bog vs bogan". Nearby pair

Confusion rank #444,281 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.