WATERTIGHT Synonyms: 23 Similar and Opposite Words

watertight

adjective

Definition of watertight

as in airtight

Related Words

Relevance

Dissimilar Words

Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.

Recent Examples of watertight The shells, which are watertight and surprisingly sturdy, usually can be completed for a project in 24 hours. — Sam Lubell, Los Angeles Times, 9 May 2025 Subjected to an almost watertight international arms embargo, Iran was forced to rely mostly on self-sufficiency, religious zeal, and patriotism. — Foreign Affairs, 25 Feb. 2025 Des Cars wrote that parts of the museum are no longer watertight, posing a risk to the art’s safety. — Madeline Fitzgerald, Quartz, 28 Jan. 2025 The Woods Hole underwater acoustic system includes off-the-shelf components in a watertight Pelican case. — IEEE Spectrum, 20 Nov. 2024 See All Example Sentences for watertight

Recent Examples of Synonyms for watertight

Adjective

Raye and the platoon of ace musicians joining her are as vocally and musically airtight as possible.

— Melissa Ruggieri, USA Today, 27 Apr. 2026
The 1984 Olympics had a relatively airtight contract that protected taxpayers, but that’s not the case this time.

— Susan Shelley, Daily News, 18 Feb. 2026

Definition of airtight

Adjective

O’Neill, a physics professor at Princeton, argued for the practical possibility of building human habitats that would float between Earth and the moon, housing tens of thousands of people in hermetic environments with earthlike gravity and climate.

— Jacob Weisberg, Vanity Fair, 10 Sep. 2026
This hermetic secrecy is how Allure beauty director Sarah Kinonen and I recently found ourselves in the bathroom of a suite in the Aman hotel on New York’s Fifth Avenue, brushing our teeth while members of the Dyson public relations team looked on.

— Jenny Bailly, Allure, 1 Sep. 2026

Definition of hermetic

Adjective

Dual 6-watt drivers push 12 watts of stereo sound, BassUp gives the low end a little extra kick, and the IPX7 waterproof build means splashes and rain aren’t a crisis.

— Juhi Wadia, PC Magazine, 28 Sep. 2026
The material also has a waterproof rating of 5,000mm-plus, a wind resistance of up to 50-mph gusts, and UPF 100 protection for blocking harsh sunrays.

— Olivia Young, Travel + Leisure, 27 Sep. 2026

Definition of waterproof

Browse Nearby Words

water taxis

watertight

waterway

See all Nearby Words

Cite this Entry

Style

“Watertight.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/watertight. Accessed 2 Oct. 2026.

Copy Citation

Synonyms of watertight

adjective

Example Sentences

Browse Nearby Words

Cite this Entry

More from Merriam-Webster

Word of the Day

heterodox

Popular in Grammar & Usage

Do You Need a New Language Peeve?

More Commonly Mispronounced Words

Merriam-Webster’s Great Big List of Words You Love to Hate

'A' or 'an'? What about before 'h'? An Indefinite Article Guide

Why is '-ed' sometimes pronounced at the end of a word?

Popular in Wordplay

7 Great Ways to Say 'Great'

The Longest Long Words List

9 Words That Sound Like Insults But Aren't

The Words of the Week - Oct. 2

16 Food Words Recently Added to the Dictionary

Popular

Do You Need a New Language Peeve?

7 Great Ways to Say 'Great'

The Longest Long Words List

Games & Quizzes