whomp up (v.)

• ad-lib
• assemble
• botch
• build
• bungle
• cast
• compose
• compound
• concoct
• construct
• create
• devise
• elaborate
• erect
• evolve
• extemporize
• extrude
• fabricate
• fake
• fashion
• form
• formulate
• frame
• improvise
• indite
• make
• manufacture
• mature
• mold
• patch
• prefabricate
• prepare
• produce
• raise
• rear
• roughcast
• shape
• vamp
• write