leash vs threesome

leash and threesome both are nouns.

Word	Noun	Adjective	Verb	Adverb
leash	Yes	No	Yes	No
threesome	Yes	No	No	No

As nouns, leash and threesome are synonyms defined as:

leash and threesome: the cardinal number that is the sum of one and one and one

Other synonyms of leash include 3, deuce-ace, III, tercet, ternary, ternion, terzetto, three, tierce, trey, triad, trine, trinity, trio, triplet, troika.

leash (noun)	threesome (noun)
a figurative restraint	three people considered as a unit
restraint consisting of a rope (or light chain) used to restrain an animal	the cardinal number that is the sum of one and one and one
the cardinal number that is the sum of one and one and one

leash (verb)	threesome (verb)
fasten with a rope