Synonyms of watertight in English:

watertight


See definition of watertight

adjective

1‘a watertight container’

SYNONYMS

waterproof, water-repellent, water-resistant, weatherproof

damp-proof

impermeable, impervious, sealed, hermetically sealed, coated, proofed, rubberized

ANTONYMS

leaky

2‘Sam had arranged a watertight alibi’

SYNONYMS

indisputable, unquestionable, incontrovertible, undeniable, irrefutable, unassailable, impregnable, beyond dispute, beyond question, beyond doubt, indubitable

foolproof, sound, flawless, airtight, conclusive, perfect, without loopholes

ANTONYMS

flawed