harvestman vs Phalangium opilio

harvestman and Phalangium opilio both are nouns.

Word	Noun	Adjective	Verb	Adverb
harvestman	Yes	No	No	No
Phalangium opilio	Yes	No	No	No

As nouns, harvestman and Phalangium opilio are synonyms defined as:

harvestman and Phalangium opilio: spiderlike arachnid with a small rounded body and very long thin legs

Other synonyms of harvestman include daddy longlegs.

harvestman (noun)	Phalangium opilio (noun)
spiderlike arachnid with a small rounded body and very long thin legs	spiderlike arachnid with a small rounded body and very long thin legs