The word cumber is a verb and so doesn't have a plural form. Did you mean the word cucumber? The plural of cucumber is cucumbers.
No, it is not. It is a noun (typically a pickled cucumber) or a verb (to pickle, as in brine or vinegar). The past participle, pickled, is used as an adjective.
Yes, the word 'cucumber' is a noun; a word for a plant and the fruit of that plant; a word for a thing.
The noun 'is' is a verb, a form of the verb 'to be'. The verb 'is' functions as an auxiliary verb and a linking verb.
No, it is a verb or a noun (to go around, to surround; a round shape). The adjective form is circular.
noun
A roar is a noun. To roar is a verb.
Training is a noun and a verb. Noun: e.g. activity of acquiring skills. Verb: present participle of the verb 'train'.
Has is a verb; it is not a noun. It is the third person singular of the verb to have. It functions as a helping verb as well, but it is not a noun.
It is neither a noun or a verb.
Noun. Photosynthesizing is a verb.
is wrap a noun or verb