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Long
length (noun). Lengthen (verb)
Art
Artistic
Spectacle
Spectacular
Impress
Impressive. Unimpressive. impressively
Appear
Appearance. Disappearance
Surprising /Surprise
Unsurprisingly/Surprising/surprisingly
Inspire
Inspiration/ inspiring/ uninspiring
Enthusiasm
Enthusiastic/ly
High
Height/heighten
Mass
Massive/ly
Store
Storage
Possible
Impossible/Possibly/Impossibly
Expected
Unexpectedly
Believe
Belief/Believable/Unbelievable/Believably/Unbelievably
Mathematics
Mathematician
Discover
Discovery/ies
Product
Produce / production
Able
Enable/Unable/Disable/ability
Solve
Solution(s)
Novel
Novelist
Drama
Dramatically
Achieve
Achievements
Reserve
Reservations
Depart
Departure/Department
Comfort
Comfortable/Uncomfortable/Comfortably/Uncomfortably/Discomfort
Various
Variety
Addition
Additional/Additionally
Special
Specially
Normal
Normally
Day
Daily
Accurate
Accuracy
Arrive
Arrival
Combine
Combinations
Measure
Measurements
Predict
Predictable/Unpredictable/Predictive/Unpredictive
Certain
Certainly/Certainty/Uncertain
Collect
Collection
Rely
Reliable/Unreliable
True
Truth
Argue
Argument
Help
Helpful/Unhelpful
Conventional
Unconventional(ly)
Understand
Understanding
Individual
Individually
Instruct
Instructions/Instructor
Clear
Unclear/Clearly
Enjoy
Enjoyment/Enjoyable
Educate
Educated/uneducated/Education/Educational
Locate
dislocated/Location/dilocation
Available
Unavailable/Availability
Fright
Frightened/Frightening
Know
Knowledge/(be) knowledgeable
Weak
Weakness
Friend
Friendly/Unfriendly/Friendships
Decide
Decisions/indecision
Evident
Evidence/Evidently
Excite
Excited/Exciting/excitable
Agree
Agreement/Disagreement/disagreeable
Concentrate
Concentration
Succeed
Success/Successful/Unsuccessful/Successfully/Unsuccessfully
Efective
Effect/Effectively
Patient
Patience/Patiently/Impatiently/Impatient
Care
Carefully
Advantage
Disadvantage
Introduce
Introduction
Fly
Flight
Active
Inactive/Activity
Enthusiastic
Unenthusiastic/Enthusiasm
Champion
Championship
Formal
Informal
Logical
Illogical
Perfect
Imperfect
Real
Unreal/Reality/Realistic/Unrealistic
Visible
Invisible
Kind
Unkind/kindly
Personal
Impersonal
Regular
Irregular/regularly
Mature
Immature
Lucky
Unlucky/Luckily/Unluckily/Luck
Employed
Employer/Unemployment/Unemployed/Employee
Assist/Relevant
Assistance/Relevance
Exist
Existence
Aware
Awareness/Unaware
Run
Runner
Prefer
Preferable/Preference
Sick
Sickness/Sickly
Important
Importance/Importantly
Consider
Consideration/inconsiderate