secretarial assistant vs helper

secretarial assistant and helper both are nouns.

Word	Noun	Adjective	Verb	Adverb
secretarial assistant	Yes	No	No	No
helper	Yes	No	No	No

As nouns, helper is a hypernym of secretarial assistant; that is, helper is a word with a broader meaning than secretarial assistant:

secretarial assistant: an assistant who handles correspondence and clerical work for a boss or an organization
helper: a person who contributes to the fulfillment of a need or furtherance of an effort or purpose

Other hypernyms of secretarial assistant include assistant, help, supporter.

secretarial assistant (noun)	helper (noun)
an assistant who handles correspondence and clerical work for a boss or an organization	a person who helps people or institutions (especially with financial help)
	a person who contributes to the fulfillment of a need or furtherance of an effort or purpose