noun
ADJECTIVE
▪ effective , good , great
▪ active , tireless
▪ experienced , seasoned , veteran
▪ leading , prominent (both esp. BrE )
PREPOSITION
▪ ~ against
▪
a prominent ~ against drugs
▪ ~ for
▪
an active ~ for animal rights
▪ ~ on behalf of
▪
a veteran ~ on behalf of the disabled