... An oxymoron is a compound word with opposites in it, like living dead or hot ice.
= cumbersome (adj) = Synonyms: unwieldy, awkward, weighty, bulky, burdensome, clumsy, cumbrous, ungainly, heavyAntonym: manageable
weighty?
very weighty
The word weightier is the comparative form of weighty, and the word weighty means having a lot of weight, or in other words heavy. And weightier would therefore mean heavier. The word weighty is sometimes used metaphorically rather than literally, as in, weighty arguments. That would be, arguments that carry a lot of weight. Meaning, they matter.
pound
Christina Cooks - 2001 Weighty Issues was released on: USA: 5 October 2002
weighty eighty
A weighty opinion.
WWE Mark Henry
Hefty, weighty, large, fat
tome
The adjective weighty implies mass, or importance, but is sometimes used for large numbers.The more likely word is the number 80, spelled eighty.