blech

As a noun blech

is sheet (out of metal).

As an adjective undefined is

lacking a definition or value.

As nouns the difference between burp and blech

is that burp is a belch while blech is sheet (out of metal).

As a verb burp

is to emit a burp.

As nouns the difference between blech and cough

is that blech is sheet (out of metal) while cough is a sudden, usually noisy expulsion of air from the lungs, often involuntary.

As a verb cough is

to push air from the lungs in a quick, noisy explosion.

As nouns the difference between blech and hiccup

is that blech is sheet (out of metal) while hiccup is a spasm of the diaphragm, or the resulting sound.

As a verb hiccup is

to have the hiccups.

As a noun blech is

sheet (out of metal).

As verbs the difference between blech and blesh

is that blech is to have the vomiting reflex triggered while blesh is to quench; extinguish; put out (a fire, flame, etc.).

As an interjection blech

is an imitation of the sound of gagging, used to express disgust or disdain.

As a noun blech

is a metal sheet used to cover stovetop burners on Shabbat to allow food to be kept warm without violating the prohibition against cooking.

As a noun blech

is sheet (out of metal).

As an interjection bleah is

(slang|us) expresses negative feeling the quality of the emotion expressed is more negative than that of 'blah' and has a slight feeling of disgust, verging on nausea.

As nouns the difference between blech and bleck

is that blech is sheet (out of metal) while bleck is look, glance.

As nouns the difference between blech and beech

is that blech is sheet (out of metal) while beech is a tree of the genus fagus having a smooth, light grey trunk, oval, pointed leaves and many branches.