Synonyms of hard-core
1 dyed-in-the-woolDictionary • a hard-core group of right-wing senators
dyed-in-the-wool • He was a dyed-in-the-wool conservative.
extreme • The scheme was rejected as being too extreme.
rigid • My father is very rigid in his thinking.
staunch • He's a staunch supporter of controls on government spending.
steadfast • a steadfast friend
obstinate • He is obstinate and determined and will not give up.
intransigent • The worry is that the radicals will grow more intransigent.
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dyed-in-the-woolIf you use dyed-in-the-wool to describe someone or their beliefs, you are saying that they have very strong opinions about something, which they refuse to change.
• He was a dyed-in-the-wool conservative.
• The scheme was rejected as being too extreme.
intransigentIf you describe someone as intransigent, you mean that they refuse to behave differently or to change their attitude to something.
• The worry is that the radicals will grow more intransigent.
Thesaurus for hard-core from the Collins English Thesaurus
the members of a group or movement who form an intransigent nucleus resisting change