Synonyms for Snarl:

n.

stain, disfigure, harm, mar, hurt, spoil, mark, injure, take its toll, damage. grumble, croak, hiss, noise, baa. bumper-to-bumper, congestion charge, gridlock, busy, hold up, back up, words, filter. jump down someone's throat, lash out, let fly, tear into, rage, bite someone's head off, tell off, scold, raise your voice, abuse. complication, mess (noun)
jam, entanglement, maze, tangle, confusion.
confusion (noun)
confusion.
hindrance (noun)
complication, impediment, entanglement, constraint, constipation, deterrent, hurdle, blockage, stoppage, impasse, entrapment, encumbrance, impedance, restriction, damper, frustration, inhibition, restraint, bafflement, congestion, resistance, blockade, barrier, obstruction, hindrance, opposition, drawback, disadvantage, interruption, obstacle.
snarl (noun)
embrangle, mat, entangle, snap, maze, snarl up, tangle.
ululation (noun)
bray, cackle, bay, warble, bleat, yelp, crow, cuckoo, chatter, cluck, growl, squawk, bellow, trill, howl, caw, honk, chirp, gobble, cry, purr, whinny, quack, ululation, bawl, moo, grunt, snort, roar, squeal, mew, coo, call, bark, neigh, hoot, meow, twit.

v.

complicate (verb)
involve, confound, perplex, confuse.
complicate, mess up (verb)
involve, confuse, perplex, entangle.
grumble (verb)
growl, bark, snap, yelp, abuse.
hinder (verb)
burden, encumber, drag, hamper, constipate, foul, bar, choke, complicate, mire, plug, oppose, hinder, restrict, impair, deter, curb, check, catch, hamstring, delay, jam, stop, inhibit, frustrate, entrap, fetter, dam, bung, detain, obstruct, entangle, paralyze, congest, stay, resist, cripple, cramp, brake, tangle, clog, impede, crimp, snag, thwart, baffle, block, handicap, counter, interrupt, constrain, restrain, bottleneck.
ululate (verb)
bray, cackle, bay, warble, bleat, yelp, crow, cuckoo, chatter, cluck, growl, squawk, bellow, trill, howl, caw, honk, chirp, gobble, cry, purr, whinny, quack, ululate, bawl, moo, grunt, snort, roar, squeal, mew, coo, call, bark, neigh, hoot, meow, twit.

Other synonyms:

grumble, confusion. cry
moo, caw, whinny, meow.
embroil
encumber, embrangle.
snap
lash out.
snarl-up
snarl up.
Other relevant words:
confusion, noise, mat, words, croak, maze, hiss, grumble, bite someone's head off, embrangle, abuse, snap.

Usage examples for snarl

  1. This was so high it was merely a door cut in the fence, allowing no glimpse of what was within, and instead of immediately opening it, Mr. Dingley rapped upon it with the iron knocker, whose lion head had been wont to snarl at me years ago. – The Other Side of the Door by Lucia Chamberlain
  2. I said with a snarl turn out your pockets quick!" – Dawson Black: Retail Merchant by Harold Whitehead
  3. There are, replied Snarl only they are impossible, that is all. – Peg Woffington by Charles Reade