addition (n.)
- access
- accession
- accessory
- accident
- accidental
- accompaniment
- accord
- accretion
- accrual
- accruement
- accumulation
- acquirement
- acquisition
- addendum
- adding
- additive
- adjunct
- adjuvant
- advance
- affairs
- affiliation
- affinity
- agglomeration
- aggrandizement
- aggregation
- agreement
- alliance
- amalgamation
- amplification
- annex
- annexation
- appanage
- appendage
- appendix
- appreciation
- approximation
- appurtenance
- ascent
- assemblage
- assimilation
- association
- attachment
- attainment
- augmentation
- auxiliary
- ballooning
- beyond
- blend
- blending
- bond
- boom
- boost
- broadening
- buildup
- cabal
- cartel
- centralization
- closeness
- coalescence
- coalition
- coda
- collateral
- combination
- combine
- combining
- combo
- complement
- composition
- concomitant
- confederacy
- confederation
- congeries
- conglomeration
- conjugation
- conjunction
- connectedness
- connection
- consolidation
- conspiracy
- contiguity
- contingency
- contingent
- continuation
- contrariety
- corollary
- crescendo
- dealings
- deduction
- deployment
- development
- differentiation
- disjunction
- dispersion
- division
- earnings
- ecumenism
- edema
- elevation
- ell
- embodiment
- encompassment
- enlargement
- enosis
- equation
- evolution
- expansion
- extension
- extra
- extrapolation
- federalization
- federation
- filiation
- fixture
- flare
- flood
- fusion
- gain
- gaining
- getting
- growth
- gush
- happenstance
- hike
- hiking
- homology
- hookup
- incidental
- inclusion
- incorporation
- increase
- increment
- inessential
- inflation
- integration
- intercourse
- interpolation
- intimacy
- inversion
- involution
- joining
- jump
- junction
- junta
- league
- leap
- liaison
- link
- linkage
- linking
- magnification
- making
- marriage
- meld
- merger
- moneymaking
- mounting
- multiplication
- nearness
- nonessential
- notation
- obtainment
- obtention
- offshoot
- other
- package
- pendant
- practice
- procural
- procurance
- procurement
- productiveness
- proliferation
- propinquity
- proportion
- proximity
- raise
- raising
- rapport
- reckoning
- reduction
- reinforcement
- relatedness
- relation
- relations
- relationship
- rider
- rise
- secondary
- similarity
- solidification
- splay
- spread
- spreading
- subsidiary
- subtraction
- summation
- supplement
- surge
- swelling
- sympathy
- syncretism
- syndication
- syneresis
- synthesis
- tailpiece
- tie
- tie-in
- tie-up
- too
- transformation
- tumescence
- unification
- union
- uniting
- up
- upping
- upsurge
- upturn
- waxing
- wedding
- widening
- wing
- winning
