What part of speech is touchdown?

"Touchdown" can be several parts of speech depending on its usage in a sentence:

* Noun: When referring to the act of scoring in American football.

* "The team celebrated after scoring a touchdown."

* Verb: When describing the act of reaching a destination or accomplishing a goal.

* "The plane touched down safely."

* "The negotiations finally touched down on a compromise."

It's important to consider the context of the sentence to determine the correct part of speech.