layer vs interlayer

layer and interlayer both are nouns.

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

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

Other hyponyms of layer include backing, mount, blanket, course, row, cushion, lift, overlay, ply, tier, wall.

layer (noun)	interlayer (noun)
thin structure composed of a single thickness of cells	a layer placed between other layers
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)	interlayer (verb)
make or form a layer