abusive, admonitory, bludgeoning, blustering, browbeating, bulldozing, bullying, cautionary, comminatory, denunciatory, deterrent, discouraging, disinclining, dissuading, dissuasive, expostulatory, fear-inspiring, foreboding, hectoring, imminent, lowering, menacing, minacious, minatory, monitory, ominous, terroristic, terrorizing, threatening, threatful

For further exploring for "intimidating" in Webster Dictionary Online