toponym vs microtoponym

toponym and microtoponym both are nouns.

Word	Noun	Adjective	Verb	Adverb
toponym	Yes	No	No	No
microtoponym	Yes	No	No	No

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

toponym: the name by which a geographical place is known
microtoponym: a name of a "minor" or small natural feature (e.g., a field, path, bridge, ditch, etc.).

toponym (noun)	microtoponym (noun)
the name by which a geographical place is known	a name of a "minor" or small natural feature (e.g., a field, path, bridge, ditch, etc.).