Synonyms for In regard to:

adj.

concerning (adjective)
regarding.
regarding (adjective)
in relation to, as to.
relative (adjective)
with respect to, concerning, related.

n.

in regard to (noun)
with reference to, as to, vis-a-vis, with regard to, with respect to, concerning, related, in relation to, related to, regarding.

prep.

concerning (preposition)
with regard to, regarding, with reference to.
of (preposition)
related to.

Other synonyms:

adj.
as to, in relation to, with respect to.
prep.
concerning, related to.
Other relevant words:
concerning.