English Words: 5

35 words

5 percenternoun

A member of the Five-Percent Nation, a cultural movement influenced by Islam, founded in 1964 in New York City.

5-cellnoun

A four-dimensional polytope, analogous to a tetrahedron, whose five bounding facets are tetrahedra.

5-gonnoun

Synonym of pentagon: A polygon with five sides and five angles.

5-HTnoun

Initialism of 5-hydroxytryptamine.

5-hydroxytryptaminenoun

The neurotransmitter serotonin.

5-Knoun

Alternative form of 5K.

5-MeO-DMTnoun

Synonym of 5-methoxy-dimethyltryptamine.

5-methoxy-dimethyltryptaminenoun

A potent hallucinogenic drug that is a methyl ether of dimethyltryptamine.

5-staradj

Luxurious and expensive.

5.1noun

A six-channel surround sound audio system, having five full-bandwidth channels and one low-frequency effects channel.

50 cent armynoun

Alleged Internet users who are paid by the authorities of the People's Republic of China to spread propaganda and disinformation on their behalf.

50-50noun

Alternative form of fifty-fifty.

50-gonnoun

Synonym of pentacontagon: A 50-sided polygon.

501(c)(3)noun

An organization that complies with section 501(c)(3) of the U.S. federal tax code. A non-profit organization exempt from some federal income taxes, due to being dedicated to charitable, religious, educational, scientific, public safety, promotion of amateur sport at the national or international level, prevention of cruelty to women or children or animals, or literary purposes.

501(c)(4)noun

An organization that complies with section 501(c)(4) of the U.S. federal tax code. A non-profit organization exempt from some federal income taxes, due to being dedicated social welfare purposes.

50501name

A grassroots movement opposing the second Donald Trump administration.

506U78noun

Former designation of Nelarabine; a chemotherapy prodrug used in treatment of T-cell acute lymphoblastic leukemia.

50Knoun

A 50 kilometer race.

50snoun

The decade of the 1950s.

51 percentnoun

A narrow or bare majority.

5150noun

One who should be involuntarily confined.

52 pickupnoun

A card game played as a practical joke, wherein the "dealer" throws the deck of cards in the air, and the other player must pick them up off the floor.

52100noun

A common ball bearing metal, also used for blademaking, knifemaking. A high-carbon low-alloy chromium steel; typically containing 1.0% carbon and 1.5% chromium, with low silicon (0.25%) and manganese (0.35%).

527noun

A tax-exempt organization whose role is to influence the selection, nomination, election, appointment or defeat of candidates for federal, state or local public office.

5280name

Denver, Colorado.

52versename

The fictional universe of DC Comics after the conclusion of Infinite Crisis, as shown in the 52 comic book series.

555adj

Pertaining to a fake telephone number. The local exchange and area code number 555 was reserved in North American dialing plan for fictional numbers, prior to the 21st century.

57thadj

Abbreviation of fifty-seventh.

5D chessnoun

An extremely complicated strategy involving deception and ulterior motives, especially in politics.

5everadv

Alternative form of fivever.

5headadj

Very intelligent; genius

5Knoun

A road race over 5 000 metres.

5th gradernoun

Alternative spelling of fifth grader.

5W1Hnoun

Any of the six basic question words in English, with 5 of them beginning with “w” (what, when, where, who, why) and 1 of them beginning with “h” (how).

5′adj

Relatively close to the 5′ end of a strand of DNA.

Spelling & Dictionary Insight

The English alphabetical index for the letter 5 contains 35 headwords drawn from our Wiktionary-derived dictionary table. At 50 entries per page the browse splits into 1 page, and you are currently viewing page 1. Every row above is a dictionary-backed entry with a canonical slug, and each links through to a full definition page with pronunciation, senses, etymology, and related-word data where available.

On this page 35 of 35 entries carry a part-of-speech tag and 35 carry at least one stored definition. Coverage varies across letters because Wiktionary volunteers build entries at different speeds for different parts of the alphabet, letters with common starting sounds (S, C, T, P) usually have the densest coverage, while less frequent starters (X, Q, Z) tend to have shorter but more specialised lists. PlainSpell surfaces whatever data is present and links back to the source when a definition is not yet recorded.

For readers using this index as a spelling reference, the guarantee is that every form you see on the list is a documented English headword, not a guess, not a derived inflection lacking a lemma row. If a word you expected to find is absent from the "5" list, it usually means the form exists only as an inflection of another lemma (e.g. a past participle stored under the infinitive) or the entry has not yet been imported from Wiktionary. Use the search bar or the misspelling lookup to resolve these cases.