oba vs Ost, What's the Difference?

Which to use

“oba” is a num and “Ost” is a noun - they look or sound alike but fill different roles in a sentence.

#20,674
“oba” frequency rank: #27,958
“Ost” frequency rank: 48632
confusion score

Side-by-Side Comparison

Feature	oba	Ost
Definition	ambos, um e outro, uma e outra	leste

Where the spellings diverge

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

3 ch

oba

3 ch

Ost

Spelling & Dictionary Insight

These two trip readers on the page rather than in the ear: oba is /ˈʔɔba/ ouvir^(fonte ?) while Ost is /ɔst/. Spoken aloud the problem disappears. In writing it persists, because they share most of their letters but differ in 2 positions, and the parts of speech differ too (num vs noun), which is usually the fastest check. Our composite confusion score for this pair is 48632, derived from the frequency rank of both members and their visual similarity.

oba is recorded at frequency rank #20,674, classified as anum, pronounced /ˈʔɔba/ ouvir^(fonte ?). Ost is at rank #27,958, tagged as anoun, pronounced /ɔst/.

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 48632, this pair ranks #16,535 of 75,631 scored Portuguese confusable pairs - among the most confusable pairs.

Orthographic DNA of oba vs Ost

Shared letters: o. Private to "oba": ab. Private to "Ost": st.

"oba" · 3 letters · shape VCV · "Ost" · 3 letters · shape VCC

Frequency comparison

oba#20,674

Ost#27,958

Source: FrequencyWords open word-frequency list

Frequently Asked Questions

Can "oba" and "Ost" be used interchangeably?

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

Which is more common, "oba" or "Ost"?

"oba" is the more common of the two: it sits at frequency rank #20,674 in our Portuguese list, against #27,958 for "Ost". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Remembering oba vs Ost

The fastest way to pick the right one every time.

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