adjective
Synonyms: invincible 1, impregnable, inconquerable, indomitable, invulnerable, unassailable, unbeatable, unconquerable, undefeatable
Related Word: irresistible, unopposable
Contrasted words: assailable, attackable
Antonyms: expugnable
adjective
Synonyms: invincible 1, impregnable, inconquerable, indomitable, invulnerable, unassailable, unbeatable, unconquerable, undefeatable
Related Word: irresistible, unopposable
Contrasted words: assailable, attackable
Antonyms: expugnable
Merriam Webster. Collegiate thesaurus English vocabulary. Английский энциклопедический словарь тезаурус. 2003