The word 'block' can be either a noun or a verb.
See link below for a list of definitions.
part of speech
Run is a verb and a noun. Verb: They run around the block each morning. Noun: I think I'll go for a quick run.
Adjective
What part of speech is thaw
The part of speech for oscillate is verb.
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
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.
The part of speech for "indefinite" is an adjective.