reduce vs thin

reduce is not an adjective while thin is an adjective.

Word	Noun	Adjective	Verb	Adverb
reduce	No	No	Yes	No
thin	No	Yes	Yes	Yes

As verbs, reduce and thin are synonyms defined as:

Other synonyms of reduce include melt off, slenderize, slim, slim down.

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

As verbs, reduce and thin are synonyms defined as:

Other synonyms of reduce include cut, dilute, thin out.

reduce (adjective)	thin (adjective)
	of relatively small extent from one surface to the opposite or in cross section
	relatively thin in consistency or low in density; not viscous
	lacking excess flesh
	(of sound) lacking resonance or volume
	not dense
	very narrow
	lacking spirit or sincere effort
	lacking substance or significance

reduce (verb)	thin (verb)
take off weight	take off weight
cut down on; make a reduction in	lose thickness; become thin or thinner
narrow or limit	make thin or thinner
cook until very little liquid is left	lessen the strength or flavor of a solution or mixture
to remove oxygen from a compound, or cause to react with hydrogen or form a hydride, or to undergo an increase in the number of electrons
make smaller
reduce in size; reduce physically
make less complex
reduce in scope while retaining essential elements
lessen the strength or flavor of a solution or mixture
be cooked until very little liquid is left
be the essential element
destress and thus weaken a sound when pronouncing it
undergo meiosis
reposition (a broken bone after surgery) back to its normal site
lower in grade or rank or force somebody into an undignified situation
lessen and make more modest
simplify the form of a mathematical equation of expression by substituting one term for another
bring to humbler or weaker state or condition
put down by force or intimidation

reduce (adverb)	thin (adverb)
	without viscosity