| verb | lie adjacent to another or share a boundary “Canada adjoins the U.S.” |
| verb | be in direct physical contact with; make contact “The two buildings touch” |
| verb | attach or add “I adjoin a copy of your my lawyer's letter” |
| border | noun | the boundary of a surface |
| edge | noun | a line determining the limits of an area |
| edging | noun | border consisting of anything placed on the edge to finish something (such as a fringe on clothing or on a rug) |
| abutment | noun | point of contact between two objects or parts |
| abutter | noun | the owner of contiguous property |
| march | noun | district consisting of the area on either side of a border or boundary of a country or an area |
| butt | noun | a joint made by fastening ends together without overlapping |
| touch | noun | the event of something coming in contact with the body |
| adjunctive | adjective | joining; forming an adjunct |
| adjunction | noun | an act of joining or adjoining things |
| contact | noun | the state or condition of touching or of being in immediate proximity |