Starts with Ends with Contains

Enter a word to see if it's playable (up to 15 letters).
Enter any letters to see what words can be formed from them.
Use up to two "?" wildcard characters to represent blank tiles or any letter.

Don't show this again

An Encylopedia Britannica Company

Starts with Ends with Contains

Enter a word to see if it's playable (up to 15 letters).
Enter any letters to see what words can be formed from them.
Use up to two "?" wildcard characters to represent blank tiles or any letter.

Don't show this again

SIGMOID is a playable word

sigmoid Scrabble^® Dictionary

noun

pl. sigmoids

an S-shaped curve in a bodily part

See the full definition of sigmoid at merriam-webster.com »

62 Playable Words can be made from "SIGMOID"

2-Letter Words (13 found)

do
gi
go
id
is
mi
mo
od
oi
om
os
si
so

3-Letter Words (25 found)

4-Letter Words (15 found)

5-Letter Words (6 found)

6-Letter Words (2 found)

7-Letter Words (1 found)

sigmoid

A Delightfully Ruthless New Word Game

Take your skills to the next level with an exciting new game from Merriam-Webster!

The Merriam-Webster
Unabridged Dictionary

Merriam-Webster Unabridged Book Cover

Online access to a
legendary resource
Log In or Sign Up »

Woman With Cell Phone

Our Dictionary,
On Your Devices

Merriam-Webster,
With Voice Search
Get the Free Apps! »

The Official SCRABBLE^®
Players Dictionary

BAE, SPORK, and ZONKEY
join over 500 new words
added to the Seventh Edition.
Learn More »

Join Us

Merriam-Webster
on Twitter »

Merriam-Webster
on Facebook »

Merriam-Webster Shop

Dictionaries, thesauruses, and new reference books for kids. See all »

Other Merriam-Webster Dictionaries

Merriam-Webster.com » Webster's Unabridged Dictionary » Nglish - Spanish-English Translation »

Browse the SCRABBLE^® Dictionary

^® 2025 Merriam-Webster, Incorporated

HASBRO, its logo, and SCRABBLE^® are trademarks of Hasbro in the U.S. and Canada and are used with permission ^® 2025 Hasbro. All Rights Reserved.