frequency

bedrock

venerable

spiral

refine

fluctuate

respiration

ominous

tolerate

pragmatic

aptitude

trajectory

hydraulic

alternative energy

organism

natural resource

fungus

evaporate

morphology

soil

backlash

genocide

fluid

delineate

stagnant

counterproductive

approximation

ecosystem

convene

instability

spiral

abolition

extravagant

semiconductor

bull market

reclaim

tariff

asteroid

extreme event

withdrawal