film vs microfilm

film and microfilm both are nouns.

Word	Noun	Adjective	Verb	Adverb
film	Yes	No	Yes	No
microfilm	Yes	No	Yes	No

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

film: photographic material consisting of a base of celluloid covered with a photographic emulsion; used to make negatives or transparencies
microfilm: film on which materials are photographed at greatly reduced size; useful for storage; a magnification system is used to read the material

As verbs, microfilm is a hyponym of film; that is, microfilm is a word with a more specific, narrower meaning than film:

Other hyponyms of film include cinematise, cinematize.

film (noun)	microfilm (noun)
a thin coating or layer	film on which materials are photographed at greatly reduced size; useful for storage; a magnification system is used to read the material
photographic material consisting of a base of celluloid covered with a photographic emulsion; used to make negatives or transparencies
a thin sheet of (usually plastic and usually transparent) material used to wrap or cover things
a medium that disseminates moving pictures
a form of entertainment that enacts a story by sound and a sequence of images giving the illusion of continuous movement

film (verb)	microfilm (verb)
make a film or photograph of something	record on microfilm
record in film