What rhymes with mountain?

Fountain is the only Word listed at rhymezone.com that rhymes with mountain other than phrases like "drinking fountain", "soda fountain", and "water fountain".

Also, though they do not look the same, but "Canton" will be a good Word for rhyming with mountain.

Actually "Canton" is only a partial rhyme with "mountain," because it does not have the "ou" sound that "mountain" has.
fountain
maintain and contain