Foam is a noun (the foam) and a verb (to foam).
Foaming is the present participle of foam.
"Foamy" is an adjective. It is used to describe something that is covered in foam or has a frothy appearance.
The foam is a part of the indigestible sugars from the lentils.
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 for "breezy" is an adjective.