IELTS vocabulary: City Life and Urbanisation

City Life and Urbanisation is a frequent Task 2 topic, covering housing, transport, and the quality of urban living, and one where candidates often reach for "big" and "crowded" to describe phenomena that are actually quite distinct from each other — a city can grow in population without becoming denser, become denser without sprawling outward, or sprawl outward while its core actually loses residents. This article works through the vocabulary that keeps those distinctions clear: growth and density, housing, planning and infrastructure, quality of life, and the confusable pairs candidates most often blur together.

Vocabulary for growth and density should come first, since it separates several genuinely different urban phenomena that get flattened into "cities are growing." "Urbanisation" specifically describes a growing proportion of a population living in cities, a demographic shift distinct from "population density," which measures how many people live per unit of area within a given place, regardless of whether the city's overall population is growing. "Densification" is the deliberate process of increasing density within existing urban areas, typically through taller buildings or smaller housing units on the same land, and is worth distinguishing from "urban sprawl," the outward, low-density expansion of a city into surrounding countryside — densification and sprawl are, in a meaningful sense, opposite responses to the same underlying population pressure. "Inner-city decline" describes a city centre losing population, investment, or vitality even as the broader metropolitan area continues to grow, often because that growth is occurring in outer suburbs instead.

Vocabulary for housing lets an essay name the specific bottleneck behind a general claim that housing is "too expensive" or "in short supply." "Housing affordability" is the general umbrella term, but "housing supply" and "housing demand" name the two sides of the actual market imbalance behind it, and a stronger essay specifies which side it believes policy should target. "Overcrowding" describes too many occupants relative to a dwelling's size or facilities, a distinct problem from affordability, since housing can be affordable but overcrowded, or expensive but not overcrowded. "Mixed-use development" (building projects combining residential, commercial, and sometimes office space within the same area or building) is a genuinely useful planning term for essays discussing alternatives to purely residential suburban development. "Gentrification" describes a process where a previously lower-income urban area sees rising property values and an influx of wealthier residents, often displacing the existing community — a term worth using precisely, since it names a specific, contested process rather than simply "an area getting nicer."

Vocabulary for planning and infrastructure gives an essay concrete policy mechanisms to discuss, beyond a vague call for "better planning." "Zoning regulations" are rules governing what can be built where — residential, commercial, industrial — and are frequently the underlying reason mixed-use development is difficult to build even where demand for it exists. "Public transport network" and "commuter belt" (the surrounding area from which people travel into a city for work) are useful for essays discussing how transport shapes where people are able to live relative to their jobs. "Smart city" describes an urban area using data and connected technology to manage services like traffic, energy, and waste more efficiently, a genuinely current term for essays discussing the future of urban management specifically. "Green infrastructure" (parks, urban forests, and natural drainage systems integrated deliberately into city design, rather than left over as unused space) is a more precise, planning-specific term than simply "green spaces."