origin vs trail head

origin and trail head both are nouns.

Word	Noun	Adjective	Verb	Adverb
origin	Yes	No	No	No
trail head	Yes	No	No	No

As nouns, trail head is a hyponym of origin; that is, trail head is a word with a more specific, narrower meaning than origin:

origin (noun)	trail head (noun)
properties attributable to your ancestry	the beginning of a trail
the point of intersection of coordinate axes; where the values of the coordinates are all zero
an event that is a beginning; a first part or stage of subsequent events
the hereditary derivation of an individual
the place where something begins, where it springs into being
the source of something's existence or from which it derives or is derived