Lichen vs. Mould

Lichen and Mould Definitions
Lichen
A composite organism made up of a fungus, usually an ascomycete, that grows symbiotically with an alga or a cyanobacterium and characteristically forms a crustlike or branching growth on rocks or tree trunks.
Mould
Variant of mold1.
Lichen
(Medicine) Any of various skin diseases characterized by patchy eruptions of small, firm papules.
Mould
Variant of mold2.
Lichen
To cover with lichens.
Mould
Variant of mold3.
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Lichen
Any of many symbiotic organisms, being associations of algae and fungi, often found as white or yellow-to-blue–green patches on rocks, old walls, etc.
Mould
Standard spelling of from2=Canadian form
Lichen
(figurative) Something which gradually spreads across something else, causing damage.
Mould
Alternative spelling of mold
Lichen
One of a class of cellular, flowerless plants, (technically called Lichenes), having no distinction of leaf and stem, usually of scaly, expanded, frond-like forms, but sometimes erect or pendulous and variously branched. They derive their nourishment from the air, and generate by means of spores. The species are very widely distributed, and form irregular spots or patches, usually of a greenish or yellowish color, upon rocks, trees, and various bodies, to which they adhere with great tenacity. They are often improperly called rock moss or tree moss.
Mould
Alternative spelling of mold#Etymology_3
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Lichen
A name given to several varieties of skin disease, esp. to one characterized by the eruption of small, conical or flat, reddish pimples, which, if unchecked, tend to spread and produce great and even fatal exhaustion.
Mould
Standard spelling of from2=Canadian form
Lichen
Any of several eruptive skin diseases characterized by hard thick lesions grouped together and resembling lichens growing on rocks
Mould
Alternative spelling of mold
Lichen
Any thallophytic plant of the division Lichenes; occur as crusty patches or bushy growths on tree trunks or rocks or bare ground etc.
Mould
See Mold, Molder, Moldy, etc.
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Mould
Loose soil rich in organic matter
Mould
A fungus that produces a superficial growth on various kinds of damp or decaying organic matter
Mould
Sculpture produced by molding
Mould
Container into which liquid is poured to create a given shape when it hardens
Mould
Form in clay, wax, etc;
Model a head with clay
Mould
Form by pouring (e.g., wax or hot metal) into a cast or mold;
Cast a bronze sculpture
Mould
Make something, usually for a specific function;
She molded the riceballs carefully
Form cylinders from the dough
Shape a figure
Work the metal into a sword