leaf-cutter bee vs leaf-cutting bee

leaf-cutter bee and leaf-cutting bee both are nouns.

Word	Noun	Adjective	Verb	Adverb
leaf-cutter bee	Yes	No	No	No
leaf-cutting bee	Yes	No	No	No

As nouns, leaf-cutter bee and leaf-cutting bee are synonyms defined as:

leaf-cutter bee and leaf-cutting bee: bee that cuts rounded pieces from leaves and flowers to line its nest

Other synonyms of leaf-cutter bee include leaf-cutter.

leaf-cutter bee (noun)	leaf-cutting bee (noun)
bee that cuts rounded pieces from leaves and flowers to line its nest	bee that cuts rounded pieces from leaves and flowers to line its nest