giant silkworm vs silkworm

giant silkworm and silkworm both are nouns.

Word	Noun	Adjective	Verb	Adverb
giant silkworm	Yes	No	No	No
silkworm	Yes	No	No	No

As nouns, giant silkworm and silkworm are synonyms defined as:

giant silkworm and silkworm: larva of a saturniid moth; spins a large amount of strong silk in constructing its cocoon

Other synonyms of giant silkworm include wild wilkworm.

giant silkworm (noun)	silkworm (noun)
larva of a saturniid moth; spins a large amount of strong silk in constructing its cocoon	the commercially bred hairless white caterpillar of the domestic silkworm moth which spins a cocoon that can be processed to yield silk fiber; the principal source of commercial silk
	larva of a saturniid moth; spins a large amount of strong silk in constructing its cocoon