Synonyms of flak

1 Syllable
knock, pan, rap
2 Syllables
outcries, dissent, protest, brickbat, effect, swipe, outcry
3 Syllables
follow-up, resultant, follow-through, re-echo, aftermath, followup, dissented, critique, censure, contention, dissention, dissension, abuse, contentions, dissensions, fault-finding
4 Syllables
notoriety, notoriousness, controversies, hostility, controversy, repercussions, condemnation, disapproval, nonconformism, opposition, repercussion
5 Syllables
animadversions, disapprobation, disparagement, animadversion
6 Syllables
materializations, materialization