line of latitude vs parallel of latitude

line of latitude and parallel of latitude both are nouns.

Word	Noun	Adjective	Verb	Adverb
line of latitude	Yes	No	No	No
parallel of latitude	Yes	No	No	No

As nouns, line of latitude and parallel of latitude are synonyms defined as:

line of latitude and parallel of latitude: an imaginary line around the Earth parallel to the equator

Other synonyms of line of latitude include latitude, parallel.

line of latitude (noun)	parallel of latitude (noun)
an imaginary line around the Earth parallel to the equator	an imaginary line around the Earth parallel to the equator