Candycane.
sky
Oh, dude, easy peasy! A zebra's mane! Wait, no, that doesn't rhyme with rain. Um, maybe a candy cane? Yeah, that's it! Like, a sugary treat that's all stripey and stuff.
Panda BrainsMary Jane'sDavid Blane's~or something...
Spain is a proper noun that rhymes with rain.
Rain.
rain coat
ignore the pain
owl hoots
crane-kick
Chain-forest
might rain
A carol rhymes with barrel and is something you sing.