All the alkanes rhyme with "brain." Methane is one alkane. You can find the rest in Wikipedia when you search "list of alkanes."
Train Brain Maine Plane raine spain lane brain rain pain insane crane terrain
stain, pain, wain, wane, pane, plane, rain
bat, chat, pat, rat, sat, scat, spat
Bass, fast, gas, mass, glass and there are many others such as grass.
Rhymes with Grass:AlasAssBassBrassCrassClassgasGlassGrassLassMassPassSassTassAlasAssBassBrassCrassClassGlassGrassLassMassPassSassTassglass, brass, mass, lass, pass, ass, sass, gas, has, jazz, pizazz, cass (as in Cassandra), bass, was.did that help?glass
No, grumbling does not rhyme with brain, perhaps you are trying to ask if complain rhymes with brain, and yes, it does.
no :(
use your brain
dane
Brain Eyes are connected to the the brain.
vein
Cocaine?
remain, brain, etc.
brain
CaingainmainpainrainbanecaneDaneJanemanepanesanewaneZaneTrainStainChainDrain
my brother blain mane,
trake