tongueless vs mute

tongueless is not a noun while mute is a noun.

Word	Noun	Adjective	Verb	Adverb
tongueless	No	Yes	No	No
mute	Yes	Yes	Yes	No

As adjectives, tongueless and mute are synonyms defined as:

Other synonyms of tongueless include silent, unspoken, wordless.

tongueless (noun)	mute (noun)
	a device used to soften the tone of a musical instrument
	a deaf person who is unable to speak

tongueless (adjective)	mute (adjective)
lacking a tongue	expressed without speech
expressed without speech	unable to speak because of hereditary deafness

tongueless (verb)	mute (verb)
	deaden (a sound or noise), especially by wrapping