weightier
Of greater significance
Weightier is the comparative form of weighty.
Something weightier carries more physical mass: The larger box proved weightier than expected.
More often the word describes matters of greater importance or seriousness: We have weightier concerns than office gossip.
A weightier argument carries more persuasive force.
heavier
Having more mass
thicker · solider · lumbering · leaden · laden · loaded · burdened · encumbered · packed · stuffed
graver
More solemn or severe
millstone
Grain-crushing circular stone
weightierlighter
Comparative of not heavy
airier · featherier · fluffier · buoyant · flimsy
weightiertrivial
Lacking significance or weight
unimportant · inconsequential · minor · insignificant · negligible
weightierfluffier
More soft and airy
lighter · superficial · shallow · frivolous · insubstantial