micrometeor vs micrometeoroid

micrometeor and micrometeoroid both are nouns.

Word	Noun	Adjective	Verb	Adverb
micrometeor	Yes	No	No	No
micrometeoroid	Yes	No	No	No

As nouns, micrometeor and micrometeoroid are synonyms defined as:

micrometeor and micrometeoroid: a meteorite or meteoroid so small that it drifts down to earth without becoming intensely heated in the atmosphere

Other synonyms of micrometeor include micrometeorite.

micrometeor (noun)	micrometeoroid (noun)
a meteorite or meteoroid so small that it drifts down to earth without becoming intensely heated in the atmosphere	a meteorite or meteoroid so small that it drifts down to earth without becoming intensely heated in the atmosphere