Word List
13 letter words
13,977 words found — showing page 1 of 70.
About this list
Our dictionary holds 13,977 13 letter words, all exactly 13 letters long. The highest-scoring of them is RAZZAMATAZZES, worth 51 points in Scrabble.
More of these words begin with P than any other letter — 1,528 of them, about 11% of the list.
227 appear in the 20,000 most common English words (2%), including international, entertainment, environmental, opportunities, communication; the remaining 13,750 are rarer finds that still count as valid plays.
13 letter words
Sorted by everyday frequency — the most common words first.
13 letter words(200)
- international13
- entertainment15
- environmental18
- opportunities17
- communication21
- accommodation22
- organizations23
- understanding16
- documentation18
- announcements17
- manufacturing21
- configuration19
- comprehensive25
- approximately29
- automatically20
- advertisement19
- manufacturers20
- professionals18
- miscellaneous17
- relationships18
- administrator16
- participation19
- certification20
- investigation17
- circumstances21
- contributions17
- consideration16
- significantly22
- consolidation16
- accessibility22
- subscriptions19
- specification22
- organisations14
- collaboration17
- corresponding19
- determination16
- unfortunately19
- concentration17
- participating20
- establishment20
- presentations15
- undergraduate16
- effectiveness24
- institutional13
- functionality21
- compatibility24
- informational18
- architectural20
- authorization25
- psychological26
- collaborative20
- instructional15
- biotechnology24
- technological21
- demonstration16
- sophisticated21
- vulnerability21
- congressional16
- modifications21
- practitioners17
- extraordinary24
- photographers24
- possibilities17
- semiconductor20
- illustrations13
- substantially18
- inappropriate19
- distinguished19
- developmental21
- notifications18
- independently20
- consciousness17
- transcription17
- complications21
- distributions16
- championships27
- precipitation19
- mediterranean16
- revolutionary19
- accreditation18
- parliamentary20
- questionnaire22
- qualification27
- computational19
- characterized30
- conversations18
- bibliographic25
- investigators17
- complimentary24
- contamination17
- alternatively19
- controversial18
- installations13
- entrepreneurs15
- commissioners19
- interventions16
- restructuring16
- strengthening18
- complementary24
- reimbursement19
- investigating18
- neighborhoods23
- incorporation17
- appropriately22
- traditionally17
- objectionable26
- globalization25
- inspirational15
- philosophical25
- justification25
- incorporating18
- supplementary22
- discrepancies20
- consultations15
- prescriptions19
- dissemination16
- conservatives21
- communicating22
- visualization25
- prerequisites24
- appropriation19
- proliferation18
- approximation26
- correspondent18
- beneficiaries20
- clarification20
- abbreviations20
- neighbourhood23
- jurisdictions23
- personalities15
- customization26
- autobiography24
- architectures20
- statistically18
- demonstrating17
- profitability23
- grandchildren21
- introductions16
- physiological24
- unprecedented19
- knowledgeable24
- registrations14
- transvestites16
- chronological21
- encouragement18
- disadvantages19
- methodologies20
- multicultural17
- refrigeration17
- uncomfortable22
- reconditioned17
- enlightenment19
- disadvantaged20
- comprehension22
- uncertainties15
- redevelopment21
- investigative20
- breastfeeding20
- inconvenience20
- decomposition20
- predominantly21
- applicability24
- administering17
- privatization27
- intentionally16
- interpersonal15
- redistributed17
- transmissions15
- homosexuality28
- disappointing19
- schizophrenia32
- stabilization24
- authoritative19
- consequential24
- multinational15
- mitochondrial21
- probabilities19
- exceptionally27
- interestingly17
- retrospective20
- reproductions18
- discretionary19
- merchandising22
- pronunciation17
- fundamentally22
- clearinghouse19
- reinforcement20
- psychotherapy31
- assassination13
- dehydrogenase22
- refrigerators17
- abnormalities17
- heterogeneous17
- psychologists24
- participatory22
- multifunction20
- skateboarding21
- globalisation16
- differentiate20
- righteousness17
The far end of ordinary dictionaries
At thirteen letters the vocabulary is almost entirely formal: scientific terms, legal and administrative language, and heavily affixed abstractions. These are words you read rather than say, and most native speakers use very few of them in a year.
The list is correspondingly short compared to the middle lengths, which is exactly what makes it tractable. Fewer candidates means a single confirmed letter in an unusual position often settles the identification.
What these words are made of
Almost all of them decompose cleanly. A Latin or Greek root, a prefix marking negation or direction, and a suffix chain turning the whole thing into a noun or adjective. Pulling the ending off is always the first move.
The recurring endings at this length are the heavily abstract ones. Once you have seen a few dozen words of this shape, the constructions start to feel predictable even when the specific root is unfamiliar.
Where the list helps
Thirteen-letter entries appear in large crossword grids, in themed word searches, and in puzzles that ask for the longest possible word from a letter set. In all three cases the task is matching rather than recall.
Position filtering is the tool that matters. With a length this specific, two known letters usually cut the field to a handful, and often to one.
Greek and Latin do the building
Almost none of this vocabulary is native English. The roots come from Greek and Latin, borrowed deliberately when a field needed a name for something new, and they were chosen precisely because they combine predictably.
That predictability is useful to a solver. A handful of borrowed elements — those meaning around, across, against, self, many, small — appear again and again at the front of long words, and recognising one immediately tells you something about the meaning even when the root is unfamiliar.
The same goes for the endings, which mark what kind of thing the word is: a state, a process, a practitioner, a quality. Reading a long word as prefix plus root plus category label is how specialists parse terms they have never seen, and it works just as well on a crossword grid.
Frequently asked questions
How many thirteen-letter words are in common use?
Very few. The dictionary contains a substantial number, but ordinary writing uses a small fraction of them, and most belong to specific technical fields.
Can these words be played in Scrabble?
In principle, using several board letters. In practice it effectively never happens, because the board would need an improbable arrangement of the right letters in the right places.
What is the best way to solve a long puzzle entry?
Identify the suffix, guess the root from the crossing letters, and confirm against the pattern. Working from the end inward is faster than reading left to right at this length.