Synonyms for Common:

adj.

acceptable (adjective)
goodish.
average (adjective)
midmost, standard, middle-of-the-road, moderate, commonplace, dominant, mean, usual, middling, stereotype, mediocre, mid, predominant, median, medium, customary, conventional, mezzo, stock, run-of-the-mill, normal, average, halfway, ordinary, everyday.
average, ordinary (adjective)
current, prosaic, informal, undistinguished, typical, colloquial, Familiar, routine, accepted, universal, habitual, standard, characteristic, trite, run-of-the-mill, mediocre, prevalent, bourgeois, banal, wearisome, regular, hackneyed, workaday, trivial, general, humdrum, usual, commonplace, conventional, passable, simple, worn-out, frequent, everyday, homely, stale, prevailing, customary, probable, natural, plain, stock, monotonous, casual, stereotyped.
co-operative (adjective)
collaborative, collective, co-operating, co-operative, mutual, shared, bilateral, coefficient, co-active, collusive.
colloquial (adjective)
demotic.
combined (adjective)
conjoint.
democratic (adjective)
populist.
disreputable (adjective)
sleazy.
frequent (adjective)
often, frequent, repeated, usual, prevalent, habitual, recurrent, many.
generally known; held in common (adjective)
communistic, communal, mutual, well-known, corporate, conjoint, community, generic, popular, public, shared, widespread, united, correspondent, coincident, constant, collective.
habitual (adjective)
conventional, habitual, well-worn, Acclimated, regular, accustomed, routine, timeworn, Familiar, recurrent, conditioned, custom, repeated.
hackneyed (adjective)
timeworn, well-worn.
humble (adjective)
trivial, unassuming.
inferior (adjective)
low-grade.
low (adjective)
ill-bred, subordinate, undignified, poor.
low, coarse (adjective)
crass, vulgar, plebeian, baseborn, pedestrian, inferior, philistine, second-rate, nondescript, middling, sleazy, low-grade, poor, cheap, mean.
lowly (adjective)
baseborn, unwashed, Declassed, lowborn.
mediocre (adjective)
mundane, normal, banal, usual, average, ordinary, second-rate, routine, modest, mean, so-so, suburban, mediocre, standard.
mere (adjective)
unadorned.
regular (adjective)
constant, general, frequent, chronic, continual, everyday, orthodox, Predominating, monotonous, stock, accustomed, habitual, recurrent, periodic, mundane, Familiar, ordinary, metronomic, universal, steady, regular, normal, conventional, epochal, prevailing, cyclical, commonplace, customary, standard, canonical, rhythmic, routine, traditional, usual, average.
second-class (adjective)
second class.
unexceptional (adjective)
unexceptional.
unimaginative (adjective)
prosaic.
universal (adjective)
mass, universal, prevalent, ubiquitous, general, generic, omnipresent, master, collective.
vulgar (adjective)
coarse, tawdry, gaudy, colloquial, ill-bred, rude, sleazy, glaring, outlandish, coarse-grained, barnyard, undignified, vulgar, low, rough, unseemly, raw, rank, shameless, depraved, sordid, cheap, animal, scandalous, inelegant, repulsive, clumsy, base, cockney, in bad taste, unbecoming, crass, idiomatic, philistine, brazen, revolting, barbaric, chintzy, unrefined, indelicate, unpolished, ignoble, salty, obscene, tactless, degraded, homespun, garish, brutish, graceless, tasteless, boorish, gross, earthy, broad, profane, crude, ignominious, offensive.

adv

normally (adverb)
customarily, moderately, dominantly, usually, ordinarily, normally, predominantly, conventionally.

adv.

lowly (adverb)
humble.
normally (adverb)
customarily, moderately, dominantly, usually, ordinarily, normally, predominantly, conventionally.

n.

below, chief, born, B-list, genteel, elite, A-list, above. a lot, frequently, well-known, perpetual, repeatedly, regularly, all the time. distributed, corporate, uneven, undivided, indivisible, Among. fledged, flightless, migratory, lesser, great, gregarious, conjoint, crested, webbed, full-fledged. low-class, widespread. surprise, typical. humble, Declassed, lowly, baseborn, over. respectable, satisfactory, acceptable, O.K., fairish, sufficient, all-right, tidy, adequate, goodish, decent, fair, passable, tolerable. better, low-grade, second class, second-rate, substandard, shabby, low quality. notorious, infamous, knowledge. common (noun)
democratic, Familiar, ordinary, community, vernacular, average, frequent, coarse, standard, general, shared, unrefined, commons, park, inferior, grassroots, group, plebeian, public, communal, green, popular, mutual, informal, unwashed, vulgar, uncouth, lowborn, demotic.
green (noun)
green.
location (noun)
park, commons, green.
shared (noun)
commonly held, mutually held.

Other synonyms:

adequate, decent, all-right, tidy, satisfactory, lesser, sufficient, acceptable. respectable, Among, shabby, dull, widespread. admissible
passable.
commonplace
platitudinous.
community
community.
hackneyed
trite.
middle class
bourgeois.
monotonous
humdrum.
ordinary
undistinguished, indifferent, plain.
passable
tolerable.
uninteresting
nondescript.
worn out
hackneyed.
Other relevant words:
household, plain, substandard, prosaic, humble, workaday, park, informal, homely, platitudinous, trite, warmed-over, poor, lowly, conjoint, current, commons, unexceptional, popular, shabby, public, stereotyped, communal, simple, plebeian, vernacular, inferior.

Usage examples for common

  1. These are remarkable, since they are common to all human experience. – Thoughts on Religion by George John Romanes
  2. Hermione often gave us news of him that came through friends they had in common – My Little Sister by Elizabeth Robins
  3. There is something in common between these hands. – Memoirs of Sherlock Holmes by Sir Arthur Conan Doyle