Nouns

(n)heavyan actor who plays villainous roles
(n)heavya serious (or tragic) role in a play

Adjectives

(a)heavyof comparatively great physical weight or density“a heavy load”, “lead is a heavy metal”, “heavy mahogany furniture”
(a)heavyunusually great in degree or quantity or number“heavy taxes”, “a heavy fine”, “heavy casualties”, “heavy losses”, “heavy rain”, “heavy traffic”
(a)heavyof the military or industry; using (or being) the heaviest and most powerful armaments or weapons or equipment“heavy artillery”, “heavy infantry”, “a heavy cruiser”, “heavy guns”, “heavy industry involves large-scale production of basic products (such as steel) used by other industries”
(a)heavymarked by great psychological weight; weighted down especially with sadness or troubles or weariness“a heavy heart”, “a heavy schedule”, “heavy news”, “a heavy silence”, “heavy eyelids”
(s)fleshy, heavy, overweightusually describes a large person who is fat but has a large frame to carry it
(s)clayey, cloggy, heavy(used of soil) compact and fine-grained“the clayey soil was heavy and easily saturated”
(s)heavy, lowering, sullen, threateningdarkened by clouds“a heavy sky”
(a)heavyof great intensity or power or force“a heavy blow”, “the fighting was heavy”, “heavy seas”
(a)heavy(physics, chemistry) being or containing an isotope with greater than average atomic mass or weight“heavy hydrogen”, “heavy water”
(s)heavy(of an actor or role) being or playing the villain“Iago is the heavy role in ‘Othello’”
(s)dense, heavy, impenetrablepermitting little if any light to pass through because of denseness of matter“dense smoke”, “heavy fog”, “impenetrable gloom”
(s)heavyof relatively large extent and density“a heavy line”
(s)heavymade of fabric having considerable thickness“a heavy coat”
(s)big, heavyprodigious“big spender”, “big eater”, “heavy investor”
(s)heavy, sonorousfull and loud and deep“heavy sounds”, “a herald chosen for his sonorous voice”
(s)intemperate, hard, heavygiven to excessive indulgence of bodily appetites especially for intoxicating liquors“a hard drinker”
(s)grave, grievous, heavy, weightyof great gravity or crucial import; requiring serious thought“grave responsibilities”, “faced a grave decision in a time of crisis”, “a grievous fault”, “heavy matters of state”, “the weighty matters to be discussed at the peace conference”
(s)heavy, lumbering, ponderousslow and laborious because of weight“the heavy tread of tired troops”, “moved with a lumbering sag-bellied trot”, “ponderous prehistoric beasts”, “a ponderous yawn”
(s)heavylarge and powerful; especially designed for heavy loads or rough work“a heavy truck”, “heavy machinery”
(s)heavydense or inadequately leavened and hence likely to cause distress in the alimentary canal“a heavy pudding”
(s)heavysharply inclined“a heavy grade”
(s)heavy, weighed downfull of; bearing great weight“trees heavy with fruit”, “vines weighed down with grapes”
(s)heavy, labored, labouredrequiring or showing effort“heavy breathing”, “the subject made for labored reading”
(s)arduous, backbreaking, grueling, gruelling, hard, heavy, laborious, operose, punishing, toilsomecharacterized by effort to the point of exhaustion; especially physical effort“worked their arduous way up the mining valley”, “a grueling campaign”, “hard labor”, “heavy work”, “heavy going”, “spent many laborious hours on the project”, “set a punishing pace”
(s)heavy, leadenlacking lightness or liveliness“heavy humor”, “a leaden conversation”
(s)heavy, profound, sound, wakeless(of sleep) deep and complete“a heavy sleep”, “fell into a profound sleep”, “a sound sleeper”, “deep wakeless sleep”
(s)big, enceinte, expectant, gravid, great, large, heavy, with childin an advanced stage of pregnancy“was big with child”, “was great with child”

Adverbs

(r)heavy, heavilyslowly as if burdened by much weight“time hung heavy on their hands”