Collocations for challenger - noun
ADJ.
closest, main, nearest, serious, strong
Her nearest challenger is the vice-president.
Her nearest challenger is the vice-president.
VERB + CHALLENGER
take on
He took on various challengers, but refused to fight Jackson.
He took on various challengers, but refused to fight Jackson.
PREP.
~ for
the main challengers for the European title
the main challengers for the European title
~ to
a challenger to the prime minister
a challenger to the prime minister