The word digraph is a noun. The plural form is digraphs.
digraph
"Boat" is a word with a vowel digraph, with the "oa" representing a single vowel sound.
The part of speech that the word my is used as is an adjective.
The part of speech for this particular word is a noun.
A digraph is short for directed graph.
The part of speech for the word civilian is English grammar.
The part of speech for the word diplomacy is a noun.
H is a letter, not a word. To be a part of speech, it needs to be a word.
The part of speech for the word "boulevard" is a noun.
The word speech is a noun.
One example of a word containing the same digraph sound as "Philadelphia" is "elephant." The "ph" digraph in both words produces the same "f" sound.
It is not ANY part of speech, there is no such English word as "stroobly".