pit against (?.)

• aggravate
• alienate
• bump heads
• come between
• confront
• contend
• contrapose
• contraposit
• contrast
• counteract
• disaffect
• disunite
• divide
• estrange
• face
• fan the flame
• front
• irritate
• lie opposite
• light the fuse
• make trouble
• match
• meet head-on
• oppose
• polarize
• pose against
• provoke
• put in opposition
• separate
• set against
• set at odds
• set at variance
• set on
• set over against
• sic on
• sow dissension
• stand opposed
• stand opposite
• stir up trouble
• subtend