bicycle is a
verb
but
bicycle-built-for-two is not
a verb.
As nouns,
bicycle-built-for-two is a hyponym of
bicycle; that is, bicycle-built-for-two is a
word with a more specific, narrower meaning than
bicycle
and bicycle-built-for-two is a type of bicycle
with the definitions:
a wheeled vehicle that has two wheels and is moved by foot pedals