concentration (n.)
- abbreviation
- absorption
- abstraction
- accelerando
- acceleration
- advertence
- advertency
- agglutination
- aggravation
- alertness
- application
- approach
- ardor
- assiduity
- assiduousness
- astringency
- asymptote
- attention
- attentiveness
- awareness
- blowup
- bottleneck
- care
- centering
- centralism
- centralization
- cervix
- circumscription
- clumping
- clustering
- coarctation
- compaction
- compression
- concentrate
- concourse
- concretion
- concurrence
- condensation
- confluence
- conflux
- congress
- consciousness
- consideration
- consolidation
- constancy
- constriction
- contemplation
- contemplativeness
- contraction
- contracture
- convergence
- converging
- crossing
- curtailment
- debate
- decoction
- decrease
- deepening
- deliberation
- densification
- diligence
- diminuendo
- distillate
- distillation
- doggedness
- ear
- earnestness
- elixir
- endurance
- energy
- engagement
- engrossment
- enhancement
- enthrallment
- essence
- exacerbation
- exaggeration
- explosion
- expression
- extract
- extraction
- fervor
- fidelity
- firmness
- fixedness
- focalization
- focus
- focusing
- funnel
- hardening
- heed
- heedfulness
- hourglass
- hub
- immersion
- indefatigability
- industriousness
- industry
- inflexibility
- infusion
- insistence
- insistency
- intensification
- intentness
- involvement
- isthmus
- knitting
- laboriousness
- loyalty
- magnification
- meditation
- meeting
- melancholy
- mindfulness
- monomania
- musing
- narrowing
- neck
- note
- notice
- observance
- observation
- obsession
- obstinacy
- patience
- pensiveness
- permanence
- perseverance
- persistence
- persistency
- pertinacity
- pickup
- plodding
- preoccupation
- pressing
- purification
- quintessence
- radius
- reduction
- refinement
- reflectiveness
- regard
- reinforcement
- relentlessness
- remark
- rendering
- rendition
- resolution
- respect
- reverie
- rigidity
- sedulity
- sedulousness
- shortening
- single-mindedness
- soaking
- solidification
- speculativeness
- speedup
- spirit
- squeezing
- stability
- stamina
- staunchness
- steadfastness
- steadiness
- step-up
- strangulation
- strengthening
- strenuousness
- striction
- stricture
- stubbornness
- studiousness
- study
- submersion
- systole
- tangent
- tenaciousness
- tenacity
- thought
- thoughtfulness
- tightening
- tirelessness
- trueness
- unyieldingness
- vehemence
- wistfulness
