1. (verb) add to the very end

• add on
• affix
• supplement

2. (verb) fix to; attach

• hang on
• tack
• tack on
• tag on

3. (verb) state or say further

• add
• supply

1. (verb) add to the very end

• annex

2. (verb) fix to; attach

• subjoin

3. (verb) state or say further

• insert
• slip in
• sneak in
• stick in
• toss in

1. (verb) add to the very end

• attach

2. (verb) fix to; attach

• attach

3. (verb) state or say further

• say
• state
• tell

1. (verb) add to the very end

• accessory
• add-on
• appurtenance
• supplement
• addendum
• postscript
• supplement
• affixation
• attachment
• appendage
• appendant
• subjoining
• subjunction
• supplementation

2. (verb) fix to; attach

• appendage