Credible, conceivable, likely, presumable, probable, reasonable.
Customary, habitual, normal, prevailing, usual, wonted.
Damage, detriment, disadvantage, harm, hurt, injury, prejudice.
Dangerous, formidable, terrible.
Defame, deprecate, disparage, slander, vilify.
Defile, infect, soil, stain, sully, taint, tarnish.
Deleterious, detrimental, hurtful, harmful, mischievous, pernicious, ruinous.
Delicate, fine, minute, refined, slender.
Delightful, grateful, gratifying, refreshing, satisfying.
Difficult, laborious, toilsome, trying.