demonstrator contains the following parts

demonstrator

/'dɛmən,streɪtər/

noun
someone who participates in a public display of group feeling
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Similar:

protester

type of:
reformist crusader meliorist reformer social reformer
noun
someone who demonstrates an article to a prospective buyer
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Similar:

sales demonstrator

type of:
salesperson sales rep sales representative
noun
a teacher or teacher's assistant who demonstrates the principles that are being taught
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type of:
instructor teacher

Parts of demonstrator

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