7-letter words with S as the 2nd letter and O as the 3rd letter
7-letter words with S as the 2nd letter and O as the 3rd letter number 48, led by familiar forms such as ISOLATE and ISOTOPE.
2 of 48 are everyday words (4%). Mostly rare words: great for Scrabble, tough for daily puzzles.
With S in 2nd place, T is the most common 3rd letter (61 words). The bar under each letter shows the size of its list.
Best words to play first
- ISOLATE7
- ISOTOPE9
- ISOMERS9
- ISOFORM12
- ASOCIAL9
- ISOTYPE12
- ISOPODS10
- ISOBARS9
- ISOSPIN9
- ISOZYME21
- ISOAMYL12
- ISOTOPY12
- ISOETES7
- TSOTSIS7
- ISONOMY12
- ISOTRON7
- ISOLINE7
- ESOTERY10
- ISOBARE9
- ISOBASE9
- ISOBATH12
- ISOCHOR12
- ISODICA10
- ISODOMA10
- ISODONT8
- ISODOSE8
- ISOGAMY13
- ISOGENY11
- ISOGONE8
- ISOGONS8
- ISOGONY11
- ISOGRAM10
- ISOGRIV11
- ISOHELS10
- ISOHYET13
- ISOKONT11
- ISOLEAD8
- ISOLOGS8
- ISOMERE9
- ISONOME9
- ISOPACH14
- ISOTACH12
- ISOTONE7
- PSOASES9
- PSOATIC11
- PSOCIDS12
- TSOORIS7
- TSOURIS7
All valid words 48
- ASOCIAL9
- ESOTERY10
- ISOAMYL12
- ISOBARE9
- ISOBARS9
- ISOBASE9
- ISOBATH12
- ISOCHOR12
- ISODICA10
- ISODOMA10
- ISODONT8
- ISODOSE8
- ISOETES7
- ISOFORM12
- ISOGAMY13
- ISOGENY11
- ISOGONE8
- ISOGONS8
- ISOGONY11
- ISOGRAM10
- ISOGRIV11
- ISOHELS10
- ISOHYET13
- ISOKONT11
- ISOLATE7
- ISOLEAD8
- ISOLINE7
- ISOLOGS8
- ISOMERE9
- ISOMERS9
- ISONOME9
- ISONOMY12
- ISOPACH14
- ISOPODS10
- ISOSPIN9
- ISOTACH12
- ISOTONE7
- ISOTOPE9
- ISOTOPY12
- ISOTRON7
- ISOTYPE12
- ISOZYME21
- PSOASES9
- PSOATIC11
- PSOCIDS12
- TSOORIS7
- TSOTSIS7
- TSOURIS7
Highest-scoring words
| Word | Scrabble | Words With Friends | Dictionaries |
|---|---|---|---|
| ISOZYME | 21 | 21 | All three |
| ISOPACH | 14 | 15 | All three |
| ISOGAMY | 13 | 14 | All three |
| ISOHYET | 13 | 11 | All three |
| ISOFORM | 12 | 13 | Collins · NWL |
| ISOTYPE | 12 | 12 | All three |
| ISOAMYL | 12 | 13 | Collins only |
| ISOTOPY | 12 | 12 | All three |
| ISONOMY | 12 | 13 | All three |
| ISOBATH | 12 | 12 | All three |
| ISOCHOR | 12 | 12 | All three |
| ISOTACH | 12 | 12 | All three |
The pattern fixes the middle as “so,” but most matches begin with I: 40 of the 48 start with that letter. ISOLATE and ISOTOPE are among the more recognizable choices; many other entries are specialist terms. The total follows Collins, while NWL2023 and ENABLE accept smaller sets, so your game’s dictionary can change which candidates work.
At a glance: 7-letter words with S second and O third
- There are 48 matches across Collins, the largest dictionary set for this pattern.
- NWL2023 includes 36 matches, while ENABLE includes 33.
- Forty words begin with I; P and T account for three each.
- The most frequent final letters are E and S, with 12 words apiece.
- Only two entries rank among the 25,000 most common English words.
Which words fit the S-O pattern?
ISOLATE and ISOTOPE show the familiar “iso-” opening, and ISOMERS, ISOFORM, and ISOTYPE follow the same shape. These examples make the pattern easier to scan: after the first letter, the next two positions are fixed, while the remaining four letters vary.
The opening is unusually concentrated. I supplies 40 matches, while the other eight are split among P, T, A, and E. For comparison, the neighboring pattern with R in position two has 502 seven-letter matches, far more than this S-and-O combination, while E and S tie as the most common endings with 12 matches each.
Which matching word scores the most?
The 48-word total is Collins-based; NWL2023 has 36 and ENABLE has 33. Check your game’s word list before relying on a less familiar entry such as ISOZYME.
Questions people ask
How many 7-letter words have S second and O third?
What is the highest-scoring word with S second and O third?
Do most seven-letter S-O words start with I?
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