Putki (englanniksi)

tube (s: pitkänomainen molemmista päistä avoin kappale)
barrel (s: tykin ~ / of a large calibre firearm)
pipe (s)
duct (s)
conduit (s)
streak (s: continuous series of like events)
bout (s: period of something)
pipeline (s: figuratively / system through which something is conducted)
cow parsley (s: figuratively / plant in the family Apiaceae similar to ''Anthriscus silvestris'')