chimneyless

As a noun terms

is .

As an adjective chimneyless is

without a chimney.

As a noun chimney

is a vertical tube or hollow column used to emit environmentally polluting gaseous and solid matter (including but not limited to by-products of burning carbon or hydro-carbon based fuels); a flue.

As a verb chimney

is (climbing) to negotiate a chimney (sense #4) by pushing against the sides with back, feet, hands, etc.

As an adjective chimneyless is

without a chimney.