sex toy vs adult toy

sex toy and adult toy both are nouns.

Word	Noun	Adjective	Verb	Adverb
sex toy	Yes	No	No	No
adult toy	Yes	No	No	No

As nouns, sex toy and adult toy are synonyms defined as:

sex toy and adult toy: A sex toy is an object or device that is primarily used to facilitate human sexual pleasure, such as a dildo or vibrator.

sex toy (noun)	adult toy (noun)
A sex toy is an object or device that is primarily used to facilitate human sexual pleasure, such as a dildo or vibrator.	A sex toy is an object or device that is primarily used to facilitate human sexual pleasure, such as a dildo or vibrator.