noun

a thing that is composed of two or more separate elements; a mixture.

the air smelled like a compound of diesel and petrol fumes

amalgam,amalgamation,combination,composite,blend,mixture,mix,admixture,meld,fusion,synthesis,consolidation,alloy,hybrid,mash-up

verb

make up (a composite whole); constitute.

a dialect compounded of Spanish and Dutch

be composed of,be made up of,be constituted of,be formed from