Although is a subordinating conjunction meaning though, even though, or in spite of the fact that. When beginning a phrase or dependent clause offering a contrast to the main sentence, although is preceded by a comma. For example, "That firm does not meet our requirements for this project, although they may be worth considering for a smaller job."
It's a gerund, although it can be used as a noun.
The phrase "in addition" is a prepositional phrase in which "in" is the preposition and "addition" is its object. This phrase, as a phrase, is not a part of speech, although it may function as one, probably an adjective or adverb.
subordinate adverb conjunction, beginning an adverb clause (synonym for "although")
what part of speech is work
adverb
Although is a conjunction
It's a gerund, although it can be used as a noun.
The phrase "in addition" is a prepositional phrase in which "in" is the preposition and "addition" is its object. This phrase, as a phrase, is not a part of speech, although it may function as one, probably an adjective or adverb.
part of speech
The part of speech for this particular word is a noun.
subordinate adverb conjunction, beginning an adverb clause (synonym for "although")
adverb
what part of speech is work
what part of speech is beneath
the part of speech sashay is a averb
Did is a verb, and not is an adverb. Didn't is not any part of speech. It's a contraction of did and not.
Adjective