"Manager" is a noun, of a special class called "agency nouns" that can be formed from almost any active English verb by adding the suffix "-er" if the verb does not end in the letter e and simply "r" if the verb does end in the letter e. (If the verb ends in a vowel other than e, further spelling modifications may be required.)
The part of speech for this particular word is a noun.
part of speech
The part of speech for "answer" is a noun.
what part of speech is beneath
adverb
A business manager campaign speech may help an individual looking to get elected to a board within a company. They would highlight the individual's qualities in relation to the job desired.
The part of speech for "explicit" is an adjective.
The part of speech for "lecturer" is a noun.
The part of speech for "rapid" is an adjective.
The part of speech of "came" is a verb.
The part of speech for "breezy" is an adjective.
The part of speech for "buried" is a verb.