tumorless

As adjectives the difference between tumorless and humorless

is that tumorless is without tumors while humorless is lacking humor or levity; serious; not funny, amusing, amused, or lighthearted.

Tumourless is an alternative form of tumorless.

As adjectives the difference between tumourless and tumorless

is that tumourless is without tumours while tumorless is without tumors.

As a noun tumor

is a tumor (oncology, pathology: an abnormal growth).

As an adjective tumorless is

without tumors.