alternate/alternative
Alternate as an adjective means "substitute"
and implies second choice of two. (As a verb, pronounced
differently, alternate means "to move back and forth.") Alternative
may be either an adjective or a noun and means "one among
several."
Small lithium batteries will provide an alternate source of
energy, should the solar panels fail. [adjective]
Lithium batteries are an alternative form of energy that may
be used in extremely cold environments. [adjective]
We needed to find an alternative. [noun]
## alternate/alternative ##
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