settler vs Pilgrim

settler and Pilgrim both are nouns.

Word	Noun	Adjective	Verb	Adverb
settler	Yes	No	No	No
Pilgrim	Yes	No	No	No

As nouns, Pilgrim is a hyponym of settler; that is, Pilgrim is a word with a more specific, narrower meaning than settler:

settler: a person who settles in a new colony or moves into new country
Pilgrim: one of the colonists from England who sailed to America on the Mayflower and founded the colony of Plymouth in New England in 1620

Other hyponyms of settler include Pilgrim Father, pioneer, sourdough, homesteader, nester, squatter.

settler (noun)	Pilgrim (noun)
a person who settles in a new colony or moves into new country	one of the colonists from England who sailed to America on the Mayflower and founded the colony of Plymouth in New England in 1620
a clerk in a betting shop who calculates the winnings
a negotiator who settles disputes