complication (n.)

• abnormality
• abstruseness
• action
• affection
• affliction
• ailment
• allergy
• angle
• architectonics
• architecture
• arduousness
• argument
• atmosphere
• atrophy
• background
• bind
• blight
• burdensomeness
• catastrophe
• characterization
• clutch
• color
• complaint
• complexity
• complexness
• condition
• continuity
• contrivance
• convolution
• crabbedness
• crunch
• deepness
• defect
• deformity
• denouement
• design
• development
• device
• difficultness
• difficulty
• dilemma
• disability
• disease
• disorder
• distemper
• drawback
• embarrassment
• endemic
• entanglement
• episode
• esoterica
• fable
• gimmick
• hairiness
• handicap
• hardness
• hobble
• how-do-you-do
• illness
• imbroglio
• incident
• indisposition
• infirmity
• intricacy
• involution
• involvement
• jam
• knottiness
• laboriousness
• line
• malady
• malaise
• mess
• mix
• mood
• morass
• morbidity
• morbus
• motif
• movement
• obstacle
• obstruction
• onerousness
• oppressiveness
• pass
• pathology
• peripeteia
• perplexity
• pickle
• pinch
• plan
• plight
• plot
• predicament
• problem
• profoundness
• profundity
• quagmire
• quicksand
• ramification
• recognition
• reconditeness
• rigor
• rigorousness
• rockiness
• ruggedness
• scheme
• scrape
• seediness
• sickness
• slant
• slough
• snag
• spot
• squeeze
• stew
• story
• strait
• straits
• strenuousness
• structure
• subject
• subtlety
• swamp
• switch
• syndrome
• tanglement
• technicality
• theme
• tightrope
• toilsomeness
• tone
• topic
• toughness
• troublesomeness
• twist