The difference between Affix and Supplement

When used as nouns, affix means that which is affixed, whereas supplement means something added, especially to make up for a deficiency.

When used as verbs, affix means to attach, whereas supplement means to provide or make a supplement to something.

check bellow for the other definitions of Affix and Supplement

Affix as a noun:

That which is affixed; an appendage.
Affix as a noun (linguistic morphology):

A bound morpheme added to the word's stem's end.
Affix as a noun (linguistic morphology):

A bound morpheme added to a word's stem; the term comprises prefixes, suffixes, infixes, circumfixes, and suprafixes.
Affix as a noun (mathematics):

The complex number a+bi associated with the point in the Gauss plane with coordinates (a,b).
Affix as a noun (decorative art):

Any small feature, as a figure, a flower, or the like, added for ornament to a vessel or other utensil, to an architectural feature.

Affix as a verb (transitive):

To attach.

Examples:

"to affix a stigma to a person; to affix ridicule or blame to somebody"
Affix as a verb (transitive):

To subjoin, annex, or add at the close or end; to append to.

Examples:

"to affix a syllable to a word; to affix a seal to an instrument; to affix one's name to a writing"
Affix as a verb (transitive):

To fix or fasten figuratively; with on or upon.

Examples:

"eyes affixed upon the ground"

"rfquotek Edmund Spenser"

Supplement as a noun:

Something added, especially to make up for a deficiency.
Supplement as a noun:

An extension to a document or publication that adds information, corrects errors or brings up to date.
Supplement as a noun:

An additional section of a newspaper devoted to a specific subject.
Supplement as a noun (geometry):

An angle that, when added to a given angle, makes 180; a supplementary angle.
Supplement as a noun (nutrition, bodybuilding):

A vitamin, herbal extract or chemical compound ingested to meet dietary deficiencies or enhance muscular development.