balloon (esp. small, toy variety); airship; blimp
tumor; tumour; neoplasm; neoplasia
growth; development; growing up; growth (of a company, the economy, etc.)
moving (location, with the times, etc.); change; metastasis; spread; transition (e.g. phase transition); transfer (of learning)
malignant (cancer); virulent; pernicious (anemia, anaemia)
malignant tumor; malignant tumour
to gain knowledge; to be illuminated; enlightening; informative; illuminating
plot; scheme; trick; design; intrigue; artifice
to play a role; to serve a function; to play a part
abandonment; renunciation; resignation; abdication (responsibility, right)
increase; multiplication; propagation; proliferation
death from prostration; death from emaciation
internal organs; viscera; intestines
endocrine; incretion; internal secretion
cecum; caecum; (vermiform) appendix; appendicitis
(parasitic) host; landlord; innkeeper
to cause someone's death; to cause someone to die; to kill
cooperativeness; spirit of cooperation
circulation; rotation; cycle; loop
drawing; picture; diagram; sight; scene
pyramid-style; pyramid-shaped
something that will last a lifetime (esp. high-quality products)
dysfunction (often medical); malfunction; insufficiency
to drive away; to clear; to scatter; to disperse
restoration; return; reduction; resolution; deoxidization
domestic wastewater; household effluent