The old pipes were made of lead.

A type of metal that is soft and malleable, often used in construction and manufacturing.
The pipe was made of lead.
Lead is a heavy metal.
Old paint contained lead.
lead pipe
lead paint
lead poisoning
metal
element
substance
The teacher will lead the students on a field trip.

to guide or direct in a course or direction
She will lead the team to victory.
He can lead us through the forest.
Let me lead the way, please.
lead the way
lead the group
lead the discussion
guide
direct
conduct
She took the lead in organizing the event.

The position of being in charge or in control of a group or organization.
He has the lead in the race.
She wants to take the lead.
The team has a strong lead.
take the lead
gain the lead
lose the lead
command
direction
guidance