The difference between Protrude and Protuberate
When used as verbs, protrude means to extend from, above or beyond a surface or boundary, whereas protuberate means to bulge outward, producing a rounded protuberance.
check bellow for the other definitions of Protrude and Protuberate
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Protrude as a verb (intransitive):
To extend from, above or beyond a surface or boundary; to bulge outward; to stick out.
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Protrude as a verb (transitive):
To cause to extend from a surface or boundary; to cause to stick out. To thrust out, as through a narrow orifice or from confinement; to cause to come forth.
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Protrude as a verb (transitive, obsolete):
To thrust forward; to drive or force along.
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Protuberate as a verb (intransitive):
To bulge outward, producing a rounded protuberance.
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Protuberate as a verb (transitive, rare):
To cause to bulge outward.