snug vs comfortable

snug is a noun but comfortable is not a noun.

Word	Noun	Adjective	Verb	Adverb
snug	Yes	Yes	No	No
comfortable	No	Yes	No	No

snug (noun)	comfortable (noun)
a small secluded room

snug (adjective)	comfortable (adjective)
enjoying or affording comforting warmth and shelter especially in a small space	providing or experiencing physical well-being or relief (`comfy' is informal)
offering safety; well protected or concealed	free from stress or conducive to mental ease; having or affording peace of mind
fitting closely but comfortably	in fortunate circumstances financially; moderately rich
well and tightly constructed	sufficient to provide comfort
	having a wide margin