(n): an isolated fact that is considered separately from the whole
(n): paying particular notice (as to children or helpless people)
(n): the process whereby a person concentrates on some features of the environment to the (relative) exclusion of others
(n): (usually plural) a polite expression of desire for someone's welfare
(n): (usually plural) an acknowledgment or expression of good will (especially on meeting)
(n): a long fixed look
(n): a fixed look with eyes open wide
(n): the condition of being honored (esteemed or respected or well regarded)
(n): the state of being honored
(n): a feeling of friendship and esteem
(n): a positive feeling of liking
(n): an attitude of admiration or esteem
(n): a complex mental state involving beliefs and feelings and values and dispositions to act in certain ways
(v): deem to be
(v): judge or regard; look upon; judge
(v): look at attentively
(v): perceive with attention; direct one's gaze towards
(v): connect closely and often incriminatingly
(v): be relevant to
ha!
Or you can end every letter with "love" and see what happens. ;-)
in an e-mail where thanks is inappropriate and sincerely is too familiar, regards is often the way to go.