"weightier" in the adjective sense
1. weighty
having relatively great weight heavy
"a weighty load"
"a weighty package"
2. cogent, telling, weighty
powerfully persuasive
"a cogent argument"
"a telling presentation"
"a weighty argument"
3. grave, grievous, heavy, weighty
of 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"
4. weighty
weighing heavily on the spirit causing anxiety or worry
"weighty problems"
5. corpulent, obese, weighty, rotund
excessively fat
"a weighty man"
Source: WordNet® (An amazing lexical database of English)
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