foggy vs groggy

foggy and groggy both are adjectives.

Word	Noun	Adjective	Verb	Adverb
foggy	No	Yes	No	No
groggy	No	Yes	No	No

As adjectives, foggy and groggy are synonyms defined as:

foggy and groggy: stunned or confused and slow to react (as from blows or drunkenness or exhaustion)

Other synonyms of foggy include dazed, logy, stuporous.

foggy (adjective)	groggy (adjective)
filled or abounding with fog or mist	stunned or confused and slow to react (as from blows or drunkenness or exhaustion)
indistinct or hazy in outline
stunned or confused and slow to react (as from blows or drunkenness or exhaustion)
obscured by fog