obligevsonlineWhat's the difference?

Quick tell: oblige is a verb, online is an adjective, so they fill different roles in a sentence.

Which to use

“oblige” is a verb and “online” is an adjective - they look or sound alike but fill different roles in a sentence.

#25,505
“oblige” frequency rank
#659
“online” frequency rank
26164
confusion score

Side-by-Side Comparison

Feature oblige online
Definition To constrain someone by force or by social, moral or legal means. Of a system: connected (generally electrically) to a larger network.

Where the spellings diverge

Shared letters are muted; the letters that actually set oblige and online apart are highlighted. They share 4 letters in sequence, which is exactly why the eye skips the difference.

6 ch
oblige
6 ch
online

Spelling & Dictionary Insight

These two trip readers on the page rather than in the ear: oblige is /əˈblaɪd͡ʒ/ while online is /ˈɒnlaɪn/. 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 (verb vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 26164, derived from the frequency rank of both members and their visual similarity.

oblige is recorded at frequency rank #25,505, classified as averb, pronounced /əˈblaɪd͡ʒ/. online is at rank #659, tagged as anadj, pronounced /ˈɒnlaɪn/.

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 26164, this pair ranks #388,729 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of oblige vs online

Shared letters: eilo. Private to "oblige": bg. Private to "online": n.

"oblige" · 6 letters · shape VCCVCV  ·  "online" · 6 letters · shape VCCVCV

Known mistypes of this pair

  • obligebolige · obblige · obilge · oblgie · oblieg · obligge · obllige · olbige
  • onlinenoline · olnine · onilne · onlien · onlinne · onlline · onlnie · onnline

Frequency comparison

oblige#25,505
online#659

Source: FrequencyWords open word-frequency list

Frequently Asked Questions

Can "oblige" and "online" be used interchangeably?
No - they are not even the same part of speech. "oblige" is a verb and "online" an adjective, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "oblige" or "online"?
"online" is the more common of the two: it sits at frequency rank #659 in our English list, against #25,505 for "oblige". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

Remembering oblige vs online

The fastest way to pick the right one every time.

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

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list