What's the adjective for unionisation? Here's the word you're looking for.
Included below are past participle and present participle forms for the
verbs union, unionize and unionise which may be used as adjectives within certain contexts.
“Needless to say, his unyielding defense of the Gospel and unbending refusal to compromise on liturgical and unionistic issues alienated many.”
“He allows a man who already had apologized for unionistic actions before to go and commit the same sin again.”
“It should incorporate, however, in addition, the equally important insight of the communistic, anarchistic, syndicalistic, fascistic, co-operative and unionistic economists.”