rut

nouns

a groove or furrow (especially one in soft earth caused by wheels)
rut
is derived from
rutty
is a type of (narrower)
a long narrow furrow cut either by a natural process (such as erosion) or by a tool (as e.g. a groove in a phonograph record)
channel, groove
a settled and monotonous routine that is hard to escape
"they fell into a conversational rut"
groove, rut
applies to nonhuman mammals: a state or period of heightened sexual arousal and activity
estrus, heat, oestrus, rut

verbs

be in a state of sexual excitement; of male mammals
rut
is a type of (narrower)
have the quality of being; (copula, used with an adjective or a predicate noun)
"John is rich"; "This is not a good answer"
be
hollow out in the form of a furrow or groove
"furrow soil"
furrow, groove, rut