Synonyms for Commonplace:

adj.

average (adjective)
predominant, mid, run-of-the-mill, halfway, median, standard, stock, customary, mean, usual, midmost, stereotype, average, dominant, common, mediocre, normal, everyday, moderate, ordinary, mezzo, medium, middling, conventional, middle-of-the-road.
boring (adjective)
boring, prosaic, depressing, uninteresting, humdrum, mundane, dreary, tedious, dry, tiresome, insipid, wearisome, monotonous, well-worn, dull.
frequent (adjective)
recurrent, frequent.
hackneyed (adjective)
timeworn.
regular (adjective)
regular, mundane, habitual, general, cyclical, orthodox, conventional, Familiar, accustomed, everyday, chronic, routine, continual, normal, customary, standard, periodic, usual, stock, canonical, universal, recurrent, Predominating, monotonous, average, ordinary, steady, common, metronomic, epochal, rhythmic, traditional, constant, prevailing, frequent.
unexceptional (adjective)
unexceptional.
unimaginative (adjective)
prosaic.
usual, everyday (adjective)
conventional, mediocre, ordinary, mundane, corny, threadbare, typical, worn-out, prosaic, middling, middle-of-the-road, stale, trite, hackneyed, humdrum, unexceptional, Familiar, run-of-the-mill, stereotyped, customary, normal, uninteresting.

n.

afterthought, back talk, barb, aside, bon mot, comment, allusion, acknowledgment, backchat. surprise, typical, nondescript. undistinguished, garden-variety, cut-and-dried, formulaic, indifferent, garden, unremarkable, unexceptional, plain, good. stereotyped, stereotypic, platitudinal, excite, platitudinous, stale, warmed-over, worn-out, Overworked, bromidic, musty, overused, corny, stereotypical. clichéd saying or idea (noun)
platitude, bromide, stereotype, banality.
commonplace (noun)
tired, prosaic, cliche, shopworn, humdrum, ordinary, timeworn, hackneyed, trivial, bromide, trite, unexciting, platitude, threadbare, stock, unoriginal, well-worn, unglamourous, banal, banality, unglamorous.
platitude (noun)
bromide.
usual (noun)
study at trite.

Other synonyms:

cut-and-dried, bromidic, unremarkable, stereotypic, unexceptional, formulaic, overused, platitudinal, stereotypical, nondescript, warmed-over, garden-variety. platitudinous, Overworked, typical, garden, worn-out, stereotyped, corny. stale. indifferent. ordinary
undistinguished, plain.
trite
trite, musty.
Other relevant words:
unexceptional, unglamourous, Overworked, formulaic, platitude, plain, shopworn, worn-out, trite, platitudinous, hackneyed, stereotypic, corny, indifferent, nondescript, well-worn, threadbare, unglamorous, banal, cut-and-dried, stereotyped, musty, undistinguished, overused, bromidic, platitudinal, garden, unoriginal, banality, bromide, typical, warmed-over, unremarkable, tired, timeworn, stale, unexciting, cliche, trivial, garden-variety, stereotypical.

Usage examples for commonplace

  1. They did not kiss- it would have seemed to them too commonplace and rather terrible- but instantly took leave of one another, tightly clasping each other's hands. – Virgin Soil by Ivan S. Turgenev
  2. All is commonplace until the doors are closed upon the two. – Essays by Alice Meynell
  3. Everything seemed perfectly normal and commonplace – The-Darrow-Enigma by Severy, Melvin Linwood