Synonyms of the word

ponderous

• adj. Heavy, massive, weighty.
• adj. (figuratively, by extension) Serious, onerous, oppressive.
• adj. Clumsy, unwieldy, or slow, especially due to weight.
• adj. Dull, boring, tedious; long-winded in expression.
• adj. (rare) Characterized by or associated with pondering.
• adj. (obsolete) Dense.

heavy

• adj. (of a physical object) Having great weight.
• adj. (of a topic) Serious, somber.
• adj. Not easy to bear; burdensome; oppressive.
• adj. (Britain, slang, dated) Good.
• adj. (dated, late 1960s, 1970s, US) Profound.
• adj. (of a rate of flow) High, great.
• adj. (slang) Armed.
• adj. (music) Louder, more distorted.
• adj. (of weather) Hot and humid.
• adj. (of a person) Doing the specified activity more intensely than most other people.
• adj. (of food) High in fat or protein; difficult to digest.
• adj. Of great force, power, or intensity; deep or intense.
• adj. Laden to a great extent.
• adj. Laden with that which is weighty; encumbered; burdened; bowed down, either with an actual burden, or with…
• adj. Slow; sluggish; inactive; or lifeless, dull, inanimate, stupid.
• adj. Impeding motion; cloggy; clayey.
• adj. Not raised or leavened.
• adj. Having much body or strength; said of wines or spirits.
• adj. (obsolete) With child; pregnant.
• adv. heavily.
• adv. (India, colloquial) very.
• n. A villain or bad guy; the one responsible for evil or aggressive acts.
• n. (slang) A doorman, bouncer or bodyguard.
• n. (aviation) A large multi-engined aircraft.
• v. (often with "up") To make heavier.
• v. To sadden.
• v. (Australia, New Zealand, informal) To use power and/or wealth to exert influence on, e.g., governments…
• adj. Having the heaves.

heavy-footed

• adj. (idiomatic) Slow-moving.

lumbering

• n. The act of one who lumbers; heavy, clumsy movement.
• n. (US) The business of felling trees for lumber.
• adj. Clumsy or awkward.
• adj. Heavy, slow and laborious; ponderous.

uninteresting

• adj. Arousing little or no interest; boring or uneventful.