panelist

As a noun panelist

is a person who is a member of a panel.

As an adjective undefined is

lacking a definition or value.

As nouns the difference between panelist and expert

is that panelist is a person who is a member of a panel while expert is (label) rate assessor.

As nouns the difference between panelist and specialist

is that panelist is a person who is a member of a panel while specialist is someone who is an expert in, or devoted to, some specific branch of study or research.

As an adjective specialist is

specialised.

As nouns the difference between panelist and committee

is that panelist is a person who is a member of a panel while committee is a group of persons convened for the accomplishment of some specific purpose, typically with formal protocols.

As nouns the difference between panelist and presenter

is that panelist is a person who is a member of a panel while presenter is someone who presents a broadcast programme; a compere or master of ceremonies.

As nouns the difference between panelist and juror

is that panelist is a person who is a member of a panel while juror is juror, member of a jury.

As nouns the difference between panelist and speaker

is that panelist is a person who is a member of a panel while speaker is one who speaks.

As nouns the difference between panelist and panela

is that panelist is a person who is a member of a panel while panela is an unrefined sugar product typical of central and south america, which is basically a solid piece of sucrose and fructose obtained from the boiling and evaporation of sugarcane.

Presentator is likely misspelled.

Presentator has no English definition.

As a noun panelist

is a person who is a member of a panel.