juxtaposition (n.)

• abutment
• accession
• addition
• adjacency
• adjunct
• adjunction
• affixation
• agglutination
• annexation
• apposition
• assemblage
• assembly
• attachment
• augmentation
• canvass
• census
• collection
• colligation
• collocation
• combination
• comparison
• concourse
• concurrence
• confluence
• conflux
• congregation
• conjugation
• conjunction
• connection
• contiguity
• convergence
• gathering
• increase
• ingathering
• inventory
• joining
• junction
• mobilization
• muster
• perigee
• perihelion
• prefixation
• reinforcement
• rodeo
• roundup
• suffixation
• superfetation
• superposition
• supplementation
• survey
• syzygy
• union
• uniting