• a state formally cooperating with another for a military or other purpose

• combine or unite a resource or commodity with (another) for mutual benefit

Synonyms: combine, marry, couple, merge, amalgamate, join, pool, fuse, weld, knit

• a narrow passageway between or behind buildings

Synonyms: passage, passageway, alleyway, back alley, backstreet, lane, path, pathway, walk

• a long, narrow area in which games such as skittles and bowling are played

• a toy marble made of marble, alabaster, or glass