A pure substance has a fixed and uniform composition.
muscle composition, body composition, physical composition, or flexible composition
There is no homophone for "composition".
My roof is protected by composition tile. I'll be up all night writing this composition! I am studying the composition of macadam.
The composition of ice is H2O, and once it melts to water, its composition is ... H2O! So, no, the composition does not change.
Yes, composition is a noun.
the composition of the mantle is peridotite
topsoil composition is structure
the composition of luster is limstone
parts of a good composition
Mixtures don't necessarily have fixed composition
A fixed composition is not a characteristic of a mixture. The composition of a mixture can vary, unlike the composition of a compound that forms a chemical reaction.