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Is SO a valid word?

S1
O1

Yes. SO is a valid word.

SO is valid in the North American word list used for the Scrabble board game and other crossword tile games.

SO is in the NASPA Word List 2023 (NWL2023), the North American list that Tileside uses for challenges and the one used in club and tournament play.

Meaning

Sol, the fifth note of the musical scale; also, in this way.

More on Wiktionary

About SO

SO is everyday, and as a note of the scale it is also spelled SOL. It hooks into SOB, SOD, SOH, SOL, SOM, SON, SOP, SOS, SOT, SOU, SOW, SOX and SOY.

Settle the next one at the table: score your game free in Tileside →

SO scores 2 points

Before any bonus squares: S 1 + O 1 = 2. On a double-word square that's 4, on a triple-word 6, and every letter bonus under one of these tiles is applied first.

S1
O1

Example: SO as the first play

SO through the ★: S 1 + O 1 = 2, and the ★ doubles the first word: 4 points. New tiles are outlined.

Later in the game, put the S on a 3L square and SO is worth 4 before any word bonus.

Hooks: one tile makes a new word

After SO (14):

  • SOBweep convulsively
  • SOC
  • SODsurface layer of ground containing a mat of grass and grass roots
  • SOHthe syllable naming the fifth (dominant) note of any musical scale in solmization
  • SOLa colloid that has a continuous liquid phase in which a solid is suspended in a liquid
  • SOMthe basic unit of money in Uzbekistan
  • SONa male human offspring
  • SOPpiece of solid food for dipping in a liquid
Show 6 more back hooks
  • SOSform of SO: to a very great extent or degree
  • SOTa chronic drinker
  • SOUa former French coin of low denomination
  • SOWplace (seeds) in or on the ground for future growth
  • SOXform of SOCK: a knitted or woven covering for the foot; to strike forcefully
  • SOYa source of oil

Place that one tile so it also forms a word in the other direction and both words score.

Longer words from SO

Other forms of SO (1):

  • SOSform of SO: to a very great extent or degree

Words that start with SO:

  • SOAKsubmerge in a liquid
  • SOAPa cleansing agent made from the salts of vegetable or animal fats
  • SOARrise rapidly
  • SOBA
  • SOBSform of SOB: weep convulsively
  • SOCA
  • SOCKhosiery consisting of a cloth covering for the foot
  • SODAa sodium salt of carbonic acid
Show 4 more words
  • SODSform of SOD: surface layer of ground containing a mat of grass and grass roots
  • SOFAan upholstered seat for more than one person
  • SOFTyielding readily to pressure or weight
  • SOHSform of SOH: the syllable naming the fifth (dominant) note of any musical scale in solmization

Change one tile

Swap any one letter of SO and these are still words:

  • BOa pal
  • DOthe first tone of the diatonic musical scale; to begin and carry through to completion
  • GOa Japanese board game; to move along
  • HOused to call attention, as in “land ho!”
  • JOa sweetheart
  • LOused to attract attention or to express surprise
  • MOa moment
  • NOa negative reply
Show 4 more words
  • POa chamber pot
  • TOin the direction of
  • WOwoe; grief
  • YOused to call attention or to express affirmation

Same letters, other words

These use exactly the letters of SO:

  • OSa bone; an esker; an orifice
Add one tile: words from these letters plus one more

SO + B

SO + C

  • COSratio of the adjacent side to the hypotenuse of a right-angled triangle
  • SOC

SO + D

  • DOSform of DO: engage in
  • ODS
  • SODsurface layer of ground containing a mat of grass and grass roots

SO + E

SO + G

  • GOSform of GO: change location

SO + H

Memory tip

SO is everyday, and the fifth note of the scale, also spelled SOL. Reverse it for OS.

On these lists

Other two-letter words starting with S

Check words at the table, free

Tileside keeps score, checks words like this one during a challenge, tracks the tiles left in the bag and times turns. It runs in your phone's browser with no account and works offline.

Score a gameStudy short words

Tileside checks words against the North American list, the NASPA Word List 2023. Your group's chosen dictionary always wins. Playing the international (Collins) list? Turn on its 20 extra two-letter words in Setup.

Word list: NASPA Word List 2023, used under license. NASPA Word List 2023 Edition © NASPA 2023. The copy included in this app is licensed for personal use. You may not use it for any commercial purposes.

Works with the Scrabble board game, played at the table. Tileside is an independent product, not affiliated with or endorsed by the makers of Scrabble.