ARPANET
/ˈɑɹ.pəˌnɛt/
"arpanet" is a 7-letter English headword indexed on PlainSpell.
The verdict
“ARPANET” is uncommon English (frequency #92,347 among 3,931 “A” headwords), classed as a proper noun. The kind of spelling people second-guess.
- #92,347
- frequency rank, English
- 3,931
- “A” headwords
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Initialism of Advanced Research Projects Agency Network, the world's first operational packet-switching network.
Corpus desk
Index EN-arpanet · ARPANET · English
ARPANET · rank #92,347 · 0 variants · 0 confusables
- FREQ-RARE #92,347
- LEN-LONG 7 letters
- VOW-3 3 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-MID 3,931
- PHOTO-FINISH Artaxerxes
Nearest frequency peer: Artaxerxes (+1 rank slots)
Read with this headword: Spelling guide for this pattern
Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.
Long-tail ranks near “ARPANET”
Sparse band: bars invert rank so rarer forms read shorter
- Arbogast
Arbogast
7,658 corpus weight
- arche
arche
7,657 corpus weight
- ARPANET
ARPANET
7,654 corpus weight
- Artaxerxes
Artaxerxes
7,653 corpus weight
- artless
artless
7,651 corpus weight
- Asaf
Asaf
7,650 corpus weight
What this shows Long-tail view: where “ARPANET” sits against similarly uncommon English ranks.
| Property | Value |
|---|---|
| Headword | ARPANET |
| Language | English |
| Part of speech | Proper noun |
| IPA | /ˈɑɹ.pəˌnɛt/ |
| Letters | 7 |
| Frequency rank | #92,347 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “ARPANET” in English
Rare enough to double-check
ARPANET is uncommon English at frequency #92,347 among 3,931 “A” headwords, classed as aproper noun, transcribed /ˈɑɹ.pəˌnɛt/. Rarity is why readers land here mid-draft. Gloss: "Initialism of Advanced Research Projects Agency Network, the world's first operational packet-switching network.".
The misspelling generator found no plausible variants for ARPANET, since its letter pattern doesn't lend itself to common typo substitutions. This entry stands alone in our confusable dataset, which usually means its spelling is distinct enough that readers don't reach for a similar-looking word instead.
Etymologically, the entry records: From earlier ARPA (“Advanced Research Projects Agency”) with net for network. The correct English form is ARPANET, spelled A-R-P-A-N-E-T.
Definition
- 1Initialism of Advanced Research Projects Agency Network, the world's first operational packet-switching network.
Recorded use
Wiktionary examplesThese source excerpts show how ARPANET appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
ARPANET went online in September, 1969, and connected four computers located in California and Utah.
The ARPANET was especially important to the Internet project, and was often called the backbone network because it was the central WAN that tied researchers together.
Etymology
From earlier ARPA (“Advanced Research Projects Agency”) with net for network.
Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA); frequency ordering uses the FrequencyWords open word-frequency list (2018 English corpus, MIT). See the methodology for how each field is sourced and updated.
Frequently Asked Questions
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Similar English words by spelling shape
Same letter count and similar misspelling depth for "ARPANET", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 7 letters (nearest by frequency rank).