regard vs affection

regard and affection both are nouns.

Word	Noun	Adjective	Verb	Adverb
regard	Yes	No	Yes	No
affection	Yes	No	No	No

As nouns, affection is a hypernym of regard; that is, affection is a word with a broader meaning than regard:

Other hypernyms of regard include affectionateness, fondness, heart, philia, tenderness, warmheartedness, warmness.

regard (noun)	affection (noun)
a long fixed look	a positive feeling of liking
(usually preceded by `in') a detail or point
paying particular notice (as to children or helpless people)
an attitude of admiration or esteem
(usually plural) a polite expression of desire for someone's welfare
a feeling of friendship and esteem
the condition of being honored (esteemed or respected or well regarded)

regard (verb)	affection (verb)
deem to be
look at attentively
connect closely and often incriminatingly