large, big, monumental, solid, heavy, monolithic, huge, gigantic, humongous, enormous, more...

tiny, small, minute, slight, minuscule

neutron, proton, electron, quark, gluon, photon, W boson, Z boson, more...

huge amounts,   major or huge,   at least 100 carats,   large object,   extremely heavy,   on a large scale,   large body,   very large in scale,   really heavy,   large and heavy