prominent
1 bulging, hanging over, jutting, projecting, protruding, protrusive, protuberant, standing out
2 blatant, conspicuous, easily seen, eye-catching, in the foreground, noticeable, obtrusive, obvious, outstanding, pronounced, remarkable, salient, striking, to the fore, unmistakable
3 big-time (informal) celebrated, chief, distinguished, eminent, famous, foremost, important, leading, main, major league (informal) notable, noted, outstanding, popular, pre-eminent, renowned, respected, top, well-known, well-thought-of
Antonyms
1 concave, indented, receding
2 inconspicuous, indistinct, insignificant, unnoticeable
3 insignificant, minor, secondary, undistinguished, unimportant, unknown, unnotable