Synonyms and related words :
bordering, borderline, boundary, bounding, coastal, determinant, determinative, determining, disputable, doubtful, dubious, extreme, fringing, frontier, inferior, infinitesimal, insignificant, limbic, liminal, limit, limiting, littoral, low-priority, minimal, negligible, no great shakes, of no account, of no consequence, of no matter, of no significance, on the edge, questionable, rimming, secondary, skirting, slight, small, terminal, threshold, tiny, unimportant