inkpad vs stamp pad

inkpad and stamp pad both are nouns.

Word	Noun	Adjective	Verb	Adverb
inkpad	Yes	No	No	No
stamp pad	Yes	No	No	No

As nouns, inkpad and stamp pad are synonyms defined as:

inkpad and stamp pad: a block of absorbent material saturated with ink; used to transfer ink evenly to a rubber stamp

Other synonyms of inkpad include inking pad, pad.

inkpad (noun)	stamp pad (noun)
a block of absorbent material saturated with ink; used to transfer ink evenly to a rubber stamp	a block of absorbent material saturated with ink; used to transfer ink evenly to a rubber stamp