"Metamorphosis" is a common noun. The famous title "The Metamorphosis" authored by Franz Kafka can reasonably be considered a two word proper noun.
metamorphosis is occured in the life cycle of a butterfly in the part of the pupa
No. The platypus does not undergo any form of metamorphosis; no mammal does. The platypus is a unique species, with distinct features, but none of these are examples of incomplete metamorphosis.
part of speech
The part of speech for this particular word is a noun.
The part of speech for "answer" is a noun.
adverb
what part of speech is beneath
Justice League - 2001 Metamorphosis Part II 1-23 was released on: USA: 11 October 2002
The part of speech for "explicit" is an adjective.
The part of speech for "twirl" is a verb.
The part of speech for "unfamiliar" is an adjective.
The part of speech of "came" is a verb.