Synonyms for Obvious:

adj.

apparent, understandable (adjective)
perceptible, undeniable, accessible, open, observable, noticeable, transparent, palpable, prominent, patent, public, pronounced, unsubtle, evident, conclusive, clear, discernible, precise, indisputable, plain, self-explanatory, perceivable, manifest, distinguishable, conspicuous, overt, glaring, exposed, distinct, in evidence, visible, self-evident.
appreciable (adjective)
large, definite, apparent, marked, clear-cut, tangible.
axiomatic (adjective)
aphoristic, proverbial, accepted.
barefaced (adjective)
blatant, bold, frank, flagrant.
clear (adjective)
simple.
commonplace (adjective)
natural.
demonstrable (adjective)
axiomatic.
flagrant (adjective)
egregious.
noticeable (adjective)
under one's nose, eye-catching.
open (adjective)
perceivable.
open-and-shut (adjective)
self-explanatory.
precise (adjective)
clear-cut.
visible (adjective)
perceivable, evident, clear, exposed, observable, discernible, seeable, manifest, distinct, apparent, perceptible, plain, visible, salient, conspicuous.

n.

inclination, pronounced, conduct, instinct, human nature, schtick, see, disposition, outlook, behavior, crystal clear, spirit, posture, clear-cut. imaginative, imagination, a vivid imagination, run riot, visionary, imaginings, creative, thinkable, originality, unsubtle, creativity. naive (noun)
simple, naive, inexperienced, unsophisticated, innocent, young.
obvious (noun)
provable, conspicuous, tangible, attention-getting, large, gross, taken for granted, exhibitionistic, marked, big, prominent, bold, open-and-shut, under his nose, axiomatic, outstanding, under her nose, eye-catching, transparent, writ large, open, salient, self-evident, flagrant, plain, egregious, apparent, exhibitionist, self-explanatory, patent, rank, under our noses, in evidence, spectacular, featured, crying, striking, under my nose, overt, evident, visible, demonstrable, under one's nose, frank, glaring, manifest, under your nose, perceptible, palpable.

Other synonyms:

crystal clear, identifiable, unsubtle, show up. definite. broad. comprehensible
understandable.
conspicuous
pronounced.
observable
noticeable.
obvious
open, blatant.
separable
distinguishable.

Usage examples for obvious

  1. Gwynneth repeated the last word in a puzzled whisper; and so stood staring until the obvious explanation had become obvious to her. – Peccavi by E. W. Hornung
  2. The reason why they are not is obvious – In-Darkest-England-and-the-Way-Out by Booth, William