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Words That Start With Semi

41 words Words by letter Checked 9 Oct 2026

Here are 41 words that start with semi, from everyday words to rare ones that are still valid in word games. Common words come first with a short meaning, then the words are grouped by length, which helps with Wordle and crossword clues.

As a prefix, semi means "half" or "partly", as in semicircle and semifinal.

Words starting with semi
41
Most used
seminar
Shortest
semis
5 letter words
1

Common words that start with semi

#WordMeaningLetters
1seminarany meeting for an exchange of ideas7
2seminarya private place of education for the young8
3semiconductora substance as germanium or silicon whose electrical conductivity is intermediate between that of a metal and...13
4seminarsany meeting for an exchange of ideas8
5semifinalsone of the two competitions in the next to the last round of an elimination tournament10
6seminalcontaining seeds of later development7
7semifinalone of the two competitions in the next to the last round of an elimination tournament9
8semisone of the two competitions in the next to the last round of an elimination tournament5
9semiconductorsa substance as germanium or silicon whose electrical conductivity is intermediate between that of a metal and...14
10seminariesa private place of education for the young10
11semicircularcurved into a half circle12
12semiautomaticpartially automatic13
13semiotics(philosophy) a philosophical theory of the functions of signs and symbols9
14semicolona punctuation mark (`;') used to connect independent clauses; indicates a closer relation than does a period9
15semioticof or relating to semiotics8
16semicirclea plane figure with the shape of half a circle10
17seminariansa student at a seminary (especially a Roman Catholic seminary)11
18semiannualoccurring or payable twice each year10
19semifinalistone of four competitors remaining in a tournament by elimination12
20semifinalistsone of four competitors remaining in a tournament by elimination13
21semiconductinghaving characteristics of a semiconductor14
22semiaridsomewhat arid8
23seminariana student at a seminary (especially a Roman Catholic seminary)10
24semicolonsa punctuation mark (`;') used to connect independent clauses; indicates a closer relation than does a period10
25semitonethe musical interval between adjacent keys on a keyboard instrument8
26semitonesthe musical interval between adjacent keys on a keyboard instrument9
27semipreciousused of gemstones having less commercial value than precious stones12
28semitrailera trailer having wheels only in the rear; the front is supported by the towing vehicle11
29semitransparentallowing light to pass through diffusely15
30semiannuallytwice a year12
31semiproan athlete who plays for pay on a part-time basis7
32semiprofessionalan athlete who plays for pay on a part-time basis16
33semiofficialhaving some official authority or sanction12
34semisolidpartly solid; having a rigidity and viscosity intermediate between a solid and a liquid9
35semiology(philosophy) a philosophical theory of the functions of signs and symbols9
36semipermeable(of a membrane) selectively permeable13

5 letter words that start with semi

  • semis

7 letter words that start with semi

  • seminar
  • seminal
  • semipro

8 letter words that start with semi

  • seminary
  • seminars
  • semiotic
  • semiarid
  • semitone

9 letter words that start with semi

  • semifinal
  • semiotics
  • semicolon
  • semigroup
  • semitones
  • semisolid
  • semiology

10 letter words that start with semi

  • semifinals
  • seminaries
  • semicircle
  • semiannual
  • seminarian
  • semicolons
  • semigroups

11 letter words that start with semi

  • seminarians
  • semitrailer

12 letter words that start with semi

  • semicircular
  • semifinalist
  • semiprecious
  • seminiferous
  • semiannually
  • semiofficial

Filter all 41 words that start with semi

Narrow the full list by ending, letters inside and length. The list updates as you type.

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    Questions people ask

    How many words start with semi?

    This list has 41 words starting with semi, all from a standard word-game dictionary and all seen in real English text.

    What are common words that start with semi?

    seminar, seminary, semiconductor, seminars, semifinals, seminal, semifinal, semis.

    What 5 letter words start with semi?

    semis.

    What does the prefix semi mean?

    As a prefix, semi means "half" or "partly", as in semicircle and semifinal.

    Source: the ENABLE word list (a public-domain dictionary used for word games), ranked by how often each word appears in English text (the open wordfreq project), with short meanings from Princeton WordNet. Offensive words are left out.

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