What is another word for watertight?

Need synonyms for watertight? Here's a list of similar words from our thesaurus that you can use instead.

Adjective
Closely sealed, fastened, or fitted so that no water enters or passes through
“When the sections compress the rubber, this should form a watertight seal.”
Adjective
Without loopholes or weak points
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“The question is how, considering that both boys have watertight alibis.”
Adjective
In accordance with the truth, facts or standards
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