The difference between Heed and Regard

When used as nouns, heed means careful attention, whereas regard means a steady look, a gaze.

When used as verbs, heed means to guard, protect, whereas regard means to look at.

check bellow for the other definitions of Heed and Regard

Heed as a verb (obsolete):

To guard, protect.
Heed as a verb (transitive):

To mind; to regard with care; to take notice of; to attend to; to observe.
Heed as a verb (intransitive, archaic):

To pay attention, care.

Regard as a noun (countable):

A steady look, a gaze.
Regard as a noun:

One's concern for another; esteem.
Regard as a noun (preceded by “in” or “with”):

A particular aspect or detail; respect, sense.
Regard as a noun (uncountable):

The worth or estimation in which something or someone is held.

Examples:

"synonyms esteem repute"

"He is held in great regard in Whitehall."

Regard as a verb:

To look at; to observe.

Examples:

"She regarded us warily."
Regard as a verb (transitive):

To consider, look upon (something) in a given way etc.

Examples:

"I always regarded tabloid journalism as a social evil."

"He regards honesty as a duty."
Regard as a verb (transitive, archaic):

To take notice of, pay attention to.
Regard as a verb (transitive):

To face toward.
Regard as a verb (transitive):

To have to do with, to concern.

Examples:

"That argument does not regard the question."
Regard as a verb (transitive, obsolete):

To set store by (something), to hold (someone) in esteem; to consider to have value, to respect.