Synonyms for Shallow:

adj.

facile (adjective)
hasty, light.
frivolous (adjective)
ill-considered.
ignorant (adjective)
mindless.
inconsiderable (adjective)
inconsiderable.
indiscriminate (adjective)
undiscriminating.
low (adjective)
bottommost.
senseless (adjective)
silly.
shallow (adjective)
frivolous, lightweight, epidermal, trifling, frothy, foolish, inconsiderable, skin-deep, cursory, superficial, uncritical, slight, unthinking, farcical, piddling, simple, sketchy, petty, surface, idle, wishy-washy, shoal.
uncritical (adjective)
uncritical.

n.

chesty, choke, labored, heavily, sketchy, uncritical, bronchial, pulmonary, indrawn, breathless, one-dimensional. object (noun)
shoal.
sandbar (noun)
shoal.
shallow (noun)
shelfy, reefy, ankle-deep, light, shoal, shoaly, skin-deep, shelvy, knee-deep, fordable, wakeful, surface, superficial.

v.

change (verb)
shoal.

Other synonyms:

mindless, one-dimensional, unthinking, undiscriminating, ill-considered. impetuous, impulsive, uncritical, irresponsible, foolish. dull, sketchy. empty
idle.
stupid
simple.
trivial
frothy.

Usage examples for shallow

  1. Perhaps they can tell us what the snail is doing here- It's very unusual for him to be in shallow water like this. – The Voyages of Doctor Dolittle by Hugh Lofting
  2. I have searched all the shallow part so closely that I doubt whether even a sixpence could escape me, unless it were buried in the mud or pebbles. – Erema My Father's Sin by R. D. Blackmore