anti-royalist
He assured parliament that he had observed very little antimonarchical behaviour.
They accused him of expressing anti-monarchical sentiments.
As a young man he adopted a fiercely anti-monarchical position.
In an anti-monarchical rant, he detailed disparities between his lifestyle and that of the royal family.
The activists were jailed for antimonarchical activity.

SMART Vocabulary: related words and phrases

Royalty, aristocracy & titles
accede to something
accession
anointed
anti-monarchist
anti-royalist
dukedom
earl
earldom
emir
emperor
mister
monarch
monarchist
morganatic
Mr
royally
Rt. Hon.
Shah
sheikh
sire