handstamp vs rubber stamp

handstamp and rubber stamp both are nouns.

Word	Noun	Adjective	Verb	Adverb
handstamp	Yes	No	Yes	No
rubber stamp	Yes	No	No	No

As nouns, handstamp and rubber stamp are synonyms defined as:

handstamp and rubber stamp: a stamp (usually made of rubber) for imprinting a mark or design by hand

handstamp (noun)	rubber stamp (noun)
a stamp (usually made of rubber) for imprinting a mark or design by hand	routine authorization of an action without questions
	a stamp (usually made of rubber) for imprinting a mark or design by hand

handstamp (verb)	rubber stamp (verb)
stamp with a rubber stamp, usually an indication of official approval on a document