as in submarine
a large sandwich on a long split roll
we shared a tuna sub at lunch
Synonyms & Similar Words
Relevance
as in substitute
a person or thing that takes the place of another
we had a sub in English today, so we didn't get our test results back
Synonyms & Similar Words
as in to substitute
to serve as a replacement usually for a time only
the weekend anchor is subbing for the station's main anchor all this week she subbed for middle school teachers in the district as needed
Synonyms & Similar Words
Example Sentences
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Recent Examples of sub
Alison Foreman, IndieWire, 29 Jan. 2026
The sub grounds on rocks within sight of the Sweden’s coast, deep in its territorial waters, and near to its biggest naval base.
—John Hopewell, Variety, 27 Jan. 2026
CBS News, 20 Jan. 2026
Adelman ended up subbing out Nnaji after a 12-second stint of playing time.
—Bennett Durando, Denver Post, 19 Jan. 2026
See All Example Sentences for sub
Noun
True to the video game, the camera never leaves the Iron Lung (a mini-sub with a dark past), and that choice may come as a shock to viewers unfamiliar with the source material.
—Alison Foreman, IndieWire, 29 Jan. 2026
The sub grounds on rocks within sight of the Sweden’s coast, deep in its territorial waters, and near to its biggest naval base.
—John Hopewell, Variety, 27 Jan. 2026
Verb
By the time Embiid helped put some distance between the Pacers, Maxey was subbed out for good late in the fourth and earned a rousing ovation from Sixers fans.
—CBS News, 20 Jan. 2026
Adelman ended up subbing out Nnaji after a 12-second stint of playing time.
—Bennett Durando, Denver Post, 19 Jan. 2026
See All Example Sentences for sub
Recent Examples of Synonyms for sub
substitute
Verb
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Winner may not substitute, assign or transfer Prize or redeem Prize for cash, but Sponsor reserves the right, at its sole discretion, to substitute Prize (or portion thereof) with one of comparable or greater value.—
AJC.com,
AJC.com,
29 Jan. 2026
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This article is for informational purposes only and does not substitute for professional medical advice.—
William Jones
January 29,
Miami Herald,
29 Jan. 2026
Cite this Entry
“Sub.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/sub. Accessed 5 Feb. 2026.
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