Thesaurus
To save this word, you'll need to log in.
Synonyms & Antonyms of fathomless
being or seeming to be without limits
- impresses everyone with her fathomless knowledge of wildcats
Synonyms for fathomless
Words Related to fathomless
Near Antonyms for fathomless
Antonyms for fathomless
Keep scrolling for more
Comments on fathomless
What made you want to look up fathomless? Please tell us where you read or heard it (including the quote, if possible).
Test Your Vocabulary
Challenging Vocabulary Quiz Returns!
- Which is a synonym of fuliginous?
Can you spell these 10 commonly misspelled words?
TAKE THE QUIZ
Test Your Knowledge - and learn some interesting things along the way.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridgedWords at Play
Ask the Editors
Word Games
Share fathomless
Time Traveler for fathomless
The first known use of fathomless was in 1638
See more words from the same year