Synonyms of diehard in English:

diehard


See definition of diehard

adjective

1‘diehard traditionalists’

SYNONYMS

hard-line, hard-core, reactionary, ultra-conservative, conservative, traditionalist, unprogressive, dyed-in-the-wool, deep-dyed, long-standing, staunch, steadfast, intransigent, inflexible, immovable, unchanging, uncompromising, unyielding, indomitable, adamant, rigid, entrenched, set in one's ways

informal blimpish


noun

1‘some of the diehards are refusing to reach an agreement’

SYNONYMS

hardliner, reactionary, ultra-conservative, conservative, traditionalist, intransigent

fanatic, zealot

informal stick-in-the-mud, blimp

ANTONYMS

modernizer