softness
Word family
Synonym discussion
Sense: noun/1
All five words describe the ability of a material to change shape under pressure, but they differ in scope and typical use. Softness is the broadest, everyday term — it covers anything from a mattress to bread dough and is the only word that also implies pleasantness to touch. Pliability is more technical and suggests the ability to bend without cracking, often used for leather, plastic, or wire. Suppleness adds a nuance of resilience — a supple material returns to its original shape after bending, like high-quality leather or flexible rubber. Malleability is almost exclusive to metals (gold, aluminium) that can be hammered or rolled into thin sheets. Flexibility is the most general of the alternatives and overlaps with pliability, though it is far more common in everyday English for both physical objects ('flexible yoga mat') and abstract ideas ('flexible schedule'). For everyday descriptions of how a material feels when pressed, softness is the natural choice; the others are more specific.
Common collocations
Etymology
Softness comes from Old English sōftnes, a combination of sōfte ('soft,' 'gentle,' 'easy') and the noun-forming suffix -nes ('-ness'). The root sōfte traces back to Proto-Germanic *samftijaz, meaning 'smooth, even, comfortable,' which is also the source of German sanft ('gentle, soft') and Dutch zacht ('soft, gentle'). The word has been used in English since before the 12th century, originally referring to physical texture and gradually extending to sound, light, character, and economic conditions over the following centuries.