lateral vs sidelong

lateral is a noun but sidelong is not a noun.

Word	Noun	Adjective	Verb	Adverb
lateral	Yes	Yes	No	No
sidelong	No	Yes	No	Yes

As adjectives, lateral and sidelong are synonyms defined as:

lateral (noun)	sidelong (noun)
a pass to a receiver upfield from the passer

lateral (adjective)	sidelong (adjective)
lying away from the median and sagittal plane of a body	inclining or directed to one side
situated at or extending to the side	(used especially of glances) directed to one side with or as if with doubt or suspicion or envy
	situated at or extending to the side

lateral (adverb)	sidelong (adverb)
	to, toward or at one side
	with the side toward someone or something
	on the side