Nouns

(n)dressed ore, concentratethe desired mineral that is left after impurities have been removed from mined ore
(n)concentratea concentrated form of a foodstuff; the bulk is reduced by removing water
(n)concentratea concentrated example of something“the concentrate of contemporary despair”

Verbs

(v)concentratemake denser, stronger, or purer“concentrate juice”
(v)concentrate, focus, center, centre, pore, rivetdirect one's attention on something“Please focus on your studies and not on your hobbies”
(v)centralize, centralise, concentratemake central“The Russian government centralized the distribution of food”
(v)digest, condense, concentratemake more concise“condense the contents of a book into a summary”
(v)concentratedraw together or meet in one common center“These groups concentrate in the inner cities”
(v)condense, concentrate, contractcompress or concentrate“Congress condensed the three-year plan into a six-month plan”
(v)boil down, reduce, decoct, concentratebe cooked until very little liquid is left“The sauce should reduce to one cup”
(v)reduce, boil down, concentratecook until very little liquid is left“The cook reduced the sauce by boiling it for a long time”