consolidate

Synonyms: add to amalgamate amass band bind blend build up bunch up cement centralize compact compound concatenate concentrate condense conjoin connect densen develop federate fortify fuse harden hitch hitch on hook up with incorporate join league mass meld mix plug into pool reinforce render solid secure set slap on solidify stabilize strengthen tack on tag on team up with thicken throw in together tie in tie up with unify

Antonyms: disjoin disperse divide part separate