layer vs hypodermis

layer and hypodermis both are nouns.

Word	Noun	Adjective	Verb	Adverb
layer	Yes	No	Yes	No
hypodermis	Yes	No	No	No

As nouns, hypodermis is a hyponym of layer; that is, hypodermis is a word with a more specific, narrower meaning than layer:

layer: thin structure composed of a single thickness of cells
hypodermis: layer of cells that secretes the chitinous cuticle in e.g. arthropods

Other hyponyms of layer include blastoderm, blastodisc, germinal area, germinal disc.

layer (noun)	hypodermis (noun)
thin structure composed of a single thickness of cells	layer of cells that secretes the chitinous cuticle in e.g. arthropods
a hen that lays eggs
single thickness of usually some homogeneous substance
an abstract place usually conceived as having depth
a relatively thin sheetlike expanse or region lying over or under another

layer (verb)	hypodermis (verb)
make or form a layer