As nouns the difference between overtones and undertones

is that overtones is plural of lang=en while undertones is plural of undertone.

As a noun bill is

car (motorcar, automobile).

As nouns the difference between toad and grasshopper

is that toad is an amphibian similar to a frog with shorter back legs and a drier, more ragged skin while grasshopper is a herbivorous insect of the order Orthoptera noted for its ability to jump long distances.

As adjectives the difference between felicitous and pleasant

is that felicitous is fitting; happening at the right time while pleasant is giving pleasure; pleasing in manner.

As a noun pleasant is

(obsolete) a wit; a humorist; a buffoon.

As nouns the difference between alcohol and aminoacid

is that alcohol is any of a class of organic compounds (such as ethanol) containing a hydroxyl functional group (-OH) while aminoacid is an alternative spelling of lang=en.

As a verb released is

(release).

As verbs the difference between loosening and loose

is that loosening is present participle of lang=en while loose is to let loose, to free from restraints.

As nouns the difference between loosening and loose

is that loosening is the act of making something looser while loose is the release of an arrow.

As an adjective loose is

not fixed in place tightly or firmly.

As an interjection loose is

begin shooting; release your arrows.

As an adjective lucky

is favoured by luck; fortunate; meeting with good success or good fortune said of persons.

As a verb lucked is

(luck).

As nouns the difference between enterprise and trader

is that enterprise is a company, business, organization, or other purposeful endeavor while trader is one who gains a livelihood from trading goods or securities.

As a verb enterprise

is to undertake an enterprise, or something hazardous or difficult.

As a verb concentrate

is .

As a noun roughages is

.