manufacture

assemble, build, construct, erect, make up, put up, raise, rear, set up, structure, throw up

craft, handcraft

hew

forge, mold, shape

cobble (together or up), knock out, patch (together), throw up

prefabricate

create, invent, mint, originate

establish, father, institute, organize

concoct, contrive, cook (up), design, devise, imagine, think (up)

conceive, envisage, picture, visualize

refashion, remake, remanufacture

coin, design, hatch, produce

daydream, dream, fantasize

conceive, envisage, envision, imagine, picture, vision, visualize

ad-lib, extemporize, improvise