network architecture vs spec

network architecture and spec both are nouns.

Word	Noun	Adjective	Verb	Adverb
network architecture	Yes	No	No	No
spec	Yes	No	No	No

As nouns, spec is a hypernym of network architecture; that is, spec is a word with a broader meaning than network architecture:

network architecture: specification of design principles (including data formats and procedures) for creating a network configuration of data processors
spec: a detailed description of design criteria for a piece of work

Other hypernyms of network architecture include specification.

network architecture (noun)	spec (noun)
specification of design principles (including data formats and procedures) for creating a network configuration of data processors	a detailed description of design criteria for a piece of work