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F   U   N   C   T   I   O   N

An activity or purpose natural to or intended for a person or thing.

Example: "bridges perform the function of providing access across water"

Synonyms: purpose, task, use, role

F   O   R   M

The visible shape or configuration of something.

Example: "the form, color, and texture of the tree"

Synonyms: shape, formation, structure, appearance