Correct spelling, explanation: both mould and mold refer to the same concept but are used in different English language variations. The choice between them depends on regional spelling preferences. The etymology of both mould and mold is the same. They both derive from the Middle English word moulde, which came from Old English molu or mols, referring to loose earth or soil. Over time, the term evolved to encompass the various meanings we associate with it today, including the fungus that grows in damp conditions and the form used for shaping objects.

Definition of mould:
1. Noun, a frame on which something may be constructed
The carpenter carefully placed the wet clay into the wooden mould, shaping it into the form of a decorative ornament.
The architect designed a unique mould for casting the intricate patterns of the ornamental cornice, adding a touch of elegance to the building’s façade.
2. Verb, form (an object) out of malleable material
The sculptor skillfully moulded the clay into a lifelike representation of a majestic lion.
Using a potter’s wheel, the artist gently moulded the wet porcelain into a delicate vase with graceful curves.

Collocations with mould:
Some most commonly used collocations include:
1. Mould formation: the process by which mould develops, typically in damp or humid conditions. Proper ventilation and maintenance are essential to prevent mould formation.
Proper ventilation and maintenance are crucial to prevent mould formation in damp areas.
2. Mould-resistant: materials designed to resist the growth of mould. Such materials are commonly used in construction to prevent mould-related issues.
Materials designed to be resistant to mould, commonly used in construction and home products.
3. Mould sensitivity: refers to individuals who may experience allergic reactions or respiratory problems when exposed to mould. This sensitivity varies from person to person.
Some individuals may experience allergic reactions or respiratory problems due to mould sensitivity.
4. Mould prevention: measures taken to avoid the growth of mould, such as regular cleaning, proper ventilation, and controlling moisture levels in indoor environments.
Regular cleaning and moisture control are key to preventing mould growth in homes and structures.

Correct spelling, explanation: the primary difference between mold and mould is their spelling, and this difference is based on regional variations in English, primarily between American English and British English. The meanings of the words are essentially the same, and they can be used interchangeably depending on the context. American English typically uses mold, while British English generally uses mould, but either spelling is understood in both regions.