Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun ironclad

1 sense of ironclad

Sense 1
ironclad -- (a wooden warship of the 19th century that is plated with iron or steel armor)
       => warship, war vessel, combat ship -- (a government ship that is available for waging war)

Antonyms of adj ironclad

2 senses of ironclad

Sense 1
ironclad -- (sheathed in iron plates for protection)

INDIRECT (VIA sheathed) -> unsheathed, bare -- (not having a protective covering; "unsheathed cables"; "a bare blade")

Sense 2
ironclad, brassbound -- (inflexibly entrenched and unchangeable; "brassbound traditions"; "brassbound party loyalists"; "an ironclad rule")

INDIRECT (VIA inflexible) -> flexible -- (capable of being changed; "flexible schedules")

Similarity of adj ironclad

2 senses of ironclad

Sense 1
ironclad -- (sheathed in iron plates for protection)
       => sheathed (vs. unsheathed) -- (enclosed in a protective covering; sometimes used in combination; "his sheathed sword"; "the cat's sheathed claws"; "a ship's bottom sheathed in copper"; "copper-sheathed")

Sense 2
ironclad, brassbound -- (inflexibly entrenched and unchangeable; "brassbound traditions"; "brassbound party loyalists"; "an ironclad rule")
       => inflexible (vs. flexible) -- (incapable of change; "a man of inflexible purpose")