semblance vs phantasm

semblance and phantasm both are nouns.

Word	Noun	Adjective	Verb	Adverb
semblance	Yes	No	No	No
phantasm	Yes	No	No	No

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

Other hyponyms of semblance include apparition, fantasm, phantasma, phantom, shadow, irradiation, phantom limb.

semblance (noun)	phantasm (noun)
picture consisting of a graphic image of a person or thing	something existing in perception only
an outward or token appearance or form that is deliberately misleading	a ghostly appearing figure
an erroneous mental representation