noun
ADJECTIVE
▪ closest , formidable , main , nearest , serious , strong , worthy
▪
Her nearest ~ is the vice-president.
▪ presidential
▪ Conservative , Democratic , Labour , Republican
VERB + CHALLENGER
▪ face
▪
The Senator faces a ~ with conservative views.
▪ take on
▪
He took on various ~s, but refused to fight Jackson.
▪ beat , defeat
PREPOSITION
▪ ~ for
▪
the main ~s for the world title
▪ ~ to
▪
a ~ to their competitors' dominance of the market
▪
a ~ to the prime minister