(ordered by popularity)
significant
great
continuous
further
marked
considerable
clinical
general
substantial
little
rapid
moral
slight
gradual
dramatic
much
vast
self
steady
real
internal
economic
major
progressive
greater
agricultural
immediate
overall
symptomatic
continual
definite
environmental
remarkable
intellectual
permanent
greatest
temporary
constant
possible
distinct
mental
technological
continued
genetic
noticeable
future
technical
qualitative
spontaneous
term
functional
modest
slow
apparent
educational
subjective
radical
corresponding
civic
potential
relative
notable
striking
mutual
subsequent
incremental
obvious
instructional
tremendous
moderate
appreciable
marginal
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